1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "got_compat.h"
18 
19 #include <sys/queue.h>
20 #include <sys/stat.h>
21 #include <sys/ioctl.h>
22 
23 #include <ctype.h>
24 #include <errno.h>
25 #if defined(__FreeBSD__) || defined(__APPLE__)
26 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
27 #endif
28 #include <curses.h>
29 #include <panel.h>
30 #include <locale.h>
31 #include <signal.h>
32 #include <stdlib.h>
33 #include <stdarg.h>
34 #include <stdio.h>
35 #include <getopt.h>
36 #include <string.h>
37 #include <err.h>
38 #include <unistd.h>
39 #include <limits.h>
40 #include <wchar.h>
41 #include <time.h>
42 #include <pthread.h>
43 #include <libgen.h>
44 #include <regex.h>
45 
46 #include "got_version.h"
47 #include "got_error.h"
48 #include "got_object.h"
49 #include "got_reference.h"
50 #include "got_repository.h"
51 #include "got_diff.h"
52 #include "got_opentemp.h"
53 #include "got_utf8.h"
54 #include "got_cancel.h"
55 #include "got_commit_graph.h"
56 #include "got_blame.h"
57 #include "got_privsep.h"
58 #include "got_path.h"
59 #include "got_worktree.h"
60 #include "got_keyword.h"
61 
62 #ifndef MIN
63 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
64 #endif
65 
66 #ifndef MAX
67 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
68 #endif
69 
70 #ifndef CTRL
71 #define CTRL(x)		((x) & 0x1f)
72 #endif
73 
74 #ifndef nitems
75 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
76 #endif
77 
78 struct tog_cmd {
79 	const char *name;
80 	const struct got_error *(*cmd_main)(int, char *[]);
81 	void (*cmd_usage)(void);
82 };
83 
84 __dead static void	usage(int, int);
85 __dead static void	usage_log(void);
86 __dead static void	usage_diff(void);
87 __dead static void	usage_blame(void);
88 __dead static void	usage_tree(void);
89 __dead static void	usage_ref(void);
90 
91 static const struct got_error*	cmd_log(int, char *[]);
92 static const struct got_error*	cmd_diff(int, char *[]);
93 static const struct got_error*	cmd_blame(int, char *[]);
94 static const struct got_error*	cmd_tree(int, char *[]);
95 static const struct got_error*	cmd_ref(int, char *[]);
96 
97 static const struct tog_cmd tog_commands[] = {
98 	{ "log",	cmd_log,	usage_log },
99 	{ "diff",	cmd_diff,	usage_diff },
100 	{ "blame",	cmd_blame,	usage_blame },
101 	{ "tree",	cmd_tree,	usage_tree },
102 	{ "ref",	cmd_ref,	usage_ref },
103 };
104 
105 enum tog_view_type {
106 	TOG_VIEW_DIFF,
107 	TOG_VIEW_LOG,
108 	TOG_VIEW_BLAME,
109 	TOG_VIEW_TREE,
110 	TOG_VIEW_REF,
111 	TOG_VIEW_HELP
112 };
113 
114 /* Match _DIFF to _HELP with enum tog_view_type TOG_VIEW_* counterparts. */
115 enum tog_keymap_type {
116 	TOG_KEYMAP_KEYS = -2,
117 	TOG_KEYMAP_GLOBAL,
118 	TOG_KEYMAP_DIFF,
119 	TOG_KEYMAP_LOG,
120 	TOG_KEYMAP_BLAME,
121 	TOG_KEYMAP_TREE,
122 	TOG_KEYMAP_REF,
123 	TOG_KEYMAP_HELP
124 };
125 
126 enum tog_view_mode {
127 	TOG_VIEW_SPLIT_NONE,
128 	TOG_VIEW_SPLIT_VERT,
129 	TOG_VIEW_SPLIT_HRZN
130 };
131 
132 #define HSPLIT_SCALE	0.3f  /* default horizontal split scale */
133 
134 #define TOG_EOF_STRING	"(END)"
135 
136 struct commit_queue_entry {
137 	TAILQ_ENTRY(commit_queue_entry) entry;
138 	struct got_object_id *id;
139 	struct got_commit_object *commit;
140 	int idx;
141 };
142 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
143 struct commit_queue {
144 	int ncommits;
145 	struct commit_queue_head head;
146 };
147 
148 struct tog_color {
149 	STAILQ_ENTRY(tog_color) entry;
150 	regex_t regex;
151 	short colorpair;
152 };
153 STAILQ_HEAD(tog_colors, tog_color);
154 
155 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
156 static struct got_reflist_object_id_map *tog_refs_idmap;
157 static struct {
158 	struct got_object_id	*id;
159 	int			 idx;
160 	char			 marker;
161 } tog_base_commit;
162 static enum got_diff_algorithm tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
163 
164 static const struct got_error *
165 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
166     struct got_reference* re2)
167 {
168 	const char *name1 = got_ref_get_name(re1);
169 	const char *name2 = got_ref_get_name(re2);
170 	int isbackup1, isbackup2;
171 
172 	/* Sort backup refs towards the bottom of the list. */
173 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
174 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
175 	if (!isbackup1 && isbackup2) {
176 		*cmp = -1;
177 		return NULL;
178 	} else if (isbackup1 && !isbackup2) {
179 		*cmp = 1;
180 		return NULL;
181 	}
182 
183 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
184 	return NULL;
185 }
186 
187 static const struct got_error *
188 tog_load_refs(struct got_repository *repo, int sort_by_date)
189 {
190 	const struct got_error *err;
191 
192 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
193 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
194 	    repo);
195 	if (err)
196 		return err;
197 
198 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
199 	    repo);
200 }
201 
202 static void
203 tog_free_refs(void)
204 {
205 	if (tog_refs_idmap) {
206 		got_reflist_object_id_map_free(tog_refs_idmap);
207 		tog_refs_idmap = NULL;
208 	}
209 	got_ref_list_free(&tog_refs);
210 }
211 
212 static const struct got_error *
213 add_color(struct tog_colors *colors, const char *pattern,
214     int idx, short color)
215 {
216 	const struct got_error *err = NULL;
217 	struct tog_color *tc;
218 	int regerr = 0;
219 
220 	if (idx < 1 || idx > COLOR_PAIRS - 1)
221 		return NULL;
222 
223 	init_pair(idx, color, -1);
224 
225 	tc = calloc(1, sizeof(*tc));
226 	if (tc == NULL)
227 		return got_error_from_errno("calloc");
228 	regerr = regcomp(&tc->regex, pattern,
229 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
230 	if (regerr) {
231 		static char regerr_msg[512];
232 		static char err_msg[512];
233 		regerror(regerr, &tc->regex, regerr_msg,
234 		    sizeof(regerr_msg));
235 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
236 		    regerr_msg);
237 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
238 		free(tc);
239 		return err;
240 	}
241 	tc->colorpair = idx;
242 	STAILQ_INSERT_HEAD(colors, tc, entry);
243 	return NULL;
244 }
245 
246 static void
247 free_colors(struct tog_colors *colors)
248 {
249 	struct tog_color *tc;
250 
251 	while (!STAILQ_EMPTY(colors)) {
252 		tc = STAILQ_FIRST(colors);
253 		STAILQ_REMOVE_HEAD(colors, entry);
254 		regfree(&tc->regex);
255 		free(tc);
256 	}
257 }
258 
259 static struct tog_color *
260 get_color(struct tog_colors *colors, int colorpair)
261 {
262 	struct tog_color *tc = NULL;
263 
264 	STAILQ_FOREACH(tc, colors, entry) {
265 		if (tc->colorpair == colorpair)
266 			return tc;
267 	}
268 
269 	return NULL;
270 }
271 
272 static int
273 default_color_value(const char *envvar)
274 {
275 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
276 		return COLOR_MAGENTA;
277 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
278 		return COLOR_CYAN;
279 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
280 		return COLOR_YELLOW;
281 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
282 		return COLOR_GREEN;
283 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
284 		return COLOR_MAGENTA;
285 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
286 		return COLOR_MAGENTA;
287 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
288 		return COLOR_CYAN;
289 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
290 		return COLOR_GREEN;
291 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
292 		return COLOR_GREEN;
293 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
294 		return COLOR_CYAN;
295 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
296 		return COLOR_YELLOW;
297 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
298 		return COLOR_GREEN;
299 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
300 		return COLOR_MAGENTA;
301 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
302 		return COLOR_YELLOW;
303 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
304 		return COLOR_CYAN;
305 
306 	return -1;
307 }
308 
309 static int
310 get_color_value(const char *envvar)
311 {
312 	const char *val = getenv(envvar);
313 
314 	if (val == NULL)
315 		return default_color_value(envvar);
316 
317 	if (strcasecmp(val, "black") == 0)
318 		return COLOR_BLACK;
319 	if (strcasecmp(val, "red") == 0)
320 		return COLOR_RED;
321 	if (strcasecmp(val, "green") == 0)
322 		return COLOR_GREEN;
323 	if (strcasecmp(val, "yellow") == 0)
324 		return COLOR_YELLOW;
325 	if (strcasecmp(val, "blue") == 0)
326 		return COLOR_BLUE;
327 	if (strcasecmp(val, "magenta") == 0)
328 		return COLOR_MAGENTA;
329 	if (strcasecmp(val, "cyan") == 0)
330 		return COLOR_CYAN;
331 	if (strcasecmp(val, "white") == 0)
332 		return COLOR_WHITE;
333 	if (strcasecmp(val, "default") == 0)
334 		return -1;
335 
336 	return default_color_value(envvar);
337 }
338 
339 struct tog_diff_view_state {
340 	struct got_object_id *id1, *id2;
341 	const char *label1, *label2;
342 	FILE *f, *f1, *f2;
343 	int fd1, fd2;
344 	int lineno;
345 	int first_displayed_line;
346 	int last_displayed_line;
347 	int eof;
348 	int diff_context;
349 	int ignore_whitespace;
350 	int force_text_diff;
351 	struct got_repository *repo;
352 	struct got_diff_line *lines;
353 	size_t nlines;
354 	int matched_line;
355 	int selected_line;
356 
357 	/* passed from log or blame view; may be NULL */
358 	struct tog_view *parent_view;
359 };
360 
361 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
362 static volatile sig_atomic_t tog_thread_error;
363 
364 struct tog_log_thread_args {
365 	pthread_cond_t need_commits;
366 	pthread_cond_t commit_loaded;
367 	int commits_needed;
368 	int load_all;
369 	struct got_commit_graph *graph;
370 	struct commit_queue *real_commits;
371 	const char *in_repo_path;
372 	struct got_object_id *start_id;
373 	struct got_repository *repo;
374 	int *pack_fds;
375 	int log_complete;
376 	pthread_cond_t log_loaded;
377 	sig_atomic_t *quit;
378 	struct commit_queue_entry **first_displayed_entry;
379 	struct commit_queue_entry **selected_entry;
380 	int *searching;
381 	int *search_next_done;
382 	regex_t *regex;
383 	int *limiting;
384 	int limit_match;
385 	regex_t *limit_regex;
386 	struct commit_queue *limit_commits;
387 	struct got_worktree *worktree;
388 	int need_commit_marker;
389 };
390 
391 struct tog_log_view_state {
392 	struct commit_queue *commits;
393 	struct commit_queue_entry *first_displayed_entry;
394 	struct commit_queue_entry *last_displayed_entry;
395 	struct commit_queue_entry *selected_entry;
396 	struct commit_queue real_commits;
397 	int selected;
398 	char *in_repo_path;
399 	char *head_ref_name;
400 	int log_branches;
401 	struct got_repository *repo;
402 	struct got_object_id *start_id;
403 	sig_atomic_t quit;
404 	pthread_t thread;
405 	struct tog_log_thread_args thread_args;
406 	struct commit_queue_entry *matched_entry;
407 	struct commit_queue_entry *search_entry;
408 	struct tog_colors colors;
409 	int use_committer;
410 	int limit_view;
411 	regex_t limit_regex;
412 	struct commit_queue limit_commits;
413 };
414 
415 #define TOG_COLOR_DIFF_MINUS		1
416 #define TOG_COLOR_DIFF_PLUS		2
417 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
418 #define TOG_COLOR_DIFF_META		4
419 #define TOG_COLOR_TREE_SUBMODULE	5
420 #define TOG_COLOR_TREE_SYMLINK		6
421 #define TOG_COLOR_TREE_DIRECTORY	7
422 #define TOG_COLOR_TREE_EXECUTABLE	8
423 #define TOG_COLOR_COMMIT		9
424 #define TOG_COLOR_AUTHOR		10
425 #define TOG_COLOR_DATE			11
426 #define TOG_COLOR_REFS_HEADS		12
427 #define TOG_COLOR_REFS_TAGS		13
428 #define TOG_COLOR_REFS_REMOTES		14
429 #define TOG_COLOR_REFS_BACKUP		15
430 
431 struct tog_blame_cb_args {
432 	struct tog_blame_line *lines; /* one per line */
433 	int nlines;
434 
435 	struct tog_view *view;
436 	struct got_object_id *commit_id;
437 	int *quit;
438 };
439 
440 struct tog_blame_thread_args {
441 	const char *path;
442 	struct got_repository *repo;
443 	struct tog_blame_cb_args *cb_args;
444 	int *complete;
445 	got_cancel_cb cancel_cb;
446 	void *cancel_arg;
447 	pthread_cond_t blame_complete;
448 };
449 
450 struct tog_blame {
451 	FILE *f;
452 	off_t filesize;
453 	struct tog_blame_line *lines;
454 	int nlines;
455 	off_t *line_offsets;
456 	pthread_t thread;
457 	struct tog_blame_thread_args thread_args;
458 	struct tog_blame_cb_args cb_args;
459 	const char *path;
460 	int *pack_fds;
461 };
462 
463 struct tog_blame_view_state {
464 	int first_displayed_line;
465 	int last_displayed_line;
466 	int selected_line;
467 	int last_diffed_line;
468 	int blame_complete;
469 	int eof;
470 	int done;
471 	struct got_object_id_queue blamed_commits;
472 	struct got_object_qid *blamed_commit;
473 	char *path;
474 	struct got_repository *repo;
475 	struct got_object_id *commit_id;
476 	struct got_object_id *id_to_log;
477 	struct tog_blame blame;
478 	int matched_line;
479 	struct tog_colors colors;
480 };
481 
482 struct tog_parent_tree {
483 	TAILQ_ENTRY(tog_parent_tree) entry;
484 	struct got_tree_object *tree;
485 	struct got_tree_entry *first_displayed_entry;
486 	struct got_tree_entry *selected_entry;
487 	int selected;
488 };
489 
490 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
491 
492 struct tog_tree_view_state {
493 	char *tree_label;
494 	struct got_object_id *commit_id;/* commit which this tree belongs to */
495 	struct got_tree_object *root;	/* the commit's root tree entry */
496 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
497 	struct got_tree_entry *first_displayed_entry;
498 	struct got_tree_entry *last_displayed_entry;
499 	struct got_tree_entry *selected_entry;
500 	int ndisplayed, selected, show_ids;
501 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
502 	char *head_ref_name;
503 	struct got_repository *repo;
504 	struct got_tree_entry *matched_entry;
505 	struct tog_colors colors;
506 };
507 
508 struct tog_reflist_entry {
509 	TAILQ_ENTRY(tog_reflist_entry) entry;
510 	struct got_reference *ref;
511 	int idx;
512 };
513 
514 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
515 
516 struct tog_ref_view_state {
517 	struct tog_reflist_head refs;
518 	struct tog_reflist_entry *first_displayed_entry;
519 	struct tog_reflist_entry *last_displayed_entry;
520 	struct tog_reflist_entry *selected_entry;
521 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
522 	struct got_repository *repo;
523 	struct tog_reflist_entry *matched_entry;
524 	struct tog_colors colors;
525 };
526 
527 struct tog_help_view_state {
528 	FILE			*f;
529 	off_t			*line_offsets;
530 	size_t			 nlines;
531 	int			 lineno;
532 	int			 first_displayed_line;
533 	int			 last_displayed_line;
534 	int			 eof;
535 	int			 matched_line;
536 	int			 selected_line;
537 	int			 all;
538 	enum tog_keymap_type	 type;
539 };
540 
541 #define GENERATE_HELP \
542 	KEYMAP_("Global", TOG_KEYMAP_GLOBAL), \
543 	KEY_("H F1", "Open view-specific help (double tap for all help)"), \
544 	KEY_("k C-p Up", "Move cursor or page up one line"), \
545 	KEY_("j C-n Down", "Move cursor or page down one line"), \
546 	KEY_("C-b b PgUp", "Scroll the view up one page"), \
547 	KEY_("C-f f PgDn Space", "Scroll the view down one page"), \
548 	KEY_("C-u u", "Scroll the view up one half page"), \
549 	KEY_("C-d d", "Scroll the view down one half page"), \
550 	KEY_("g", "Go to line N (default: first line)"), \
551 	KEY_("Home =", "Go to the first line"), \
552 	KEY_("G", "Go to line N (default: last line)"), \
553 	KEY_("End *", "Go to the last line"), \
554 	KEY_("l Right", "Scroll the view right"), \
555 	KEY_("h Left", "Scroll the view left"), \
556 	KEY_("$", "Scroll view to the rightmost position"), \
557 	KEY_("0", "Scroll view to the leftmost position"), \
558 	KEY_("-", "Decrease size of the focussed split"), \
559 	KEY_("+", "Increase size of the focussed split"), \
560 	KEY_("Tab", "Switch focus between views"), \
561 	KEY_("F", "Toggle fullscreen mode"), \
562 	KEY_("S", "Switch split-screen layout"), \
563 	KEY_("/", "Open prompt to enter search term"), \
564 	KEY_("n", "Find next line/token matching the current search term"), \
565 	KEY_("N", "Find previous line/token matching the current search term"),\
566 	KEY_("q", "Quit the focussed view; Quit help screen"), \
567 	KEY_("Q", "Quit tog"), \
568 	\
569 	KEYMAP_("Log view", TOG_KEYMAP_LOG), \
570 	KEY_("< ,", "Move cursor up one commit"), \
571 	KEY_("> .", "Move cursor down one commit"), \
572 	KEY_("Enter", "Open diff view of the selected commit"), \
573 	KEY_("B", "Reload the log view and toggle display of merged commits"), \
574 	KEY_("R", "Open ref view of all repository references"), \
575 	KEY_("T", "Display tree view of the repository from the selected" \
576 	    " commit"), \
577 	KEY_("@", "Toggle between displaying author and committer name"), \
578 	KEY_("&", "Open prompt to enter term to limit commits displayed"), \
579 	KEY_("C-g Backspace", "Cancel current search or log operation"), \
580 	KEY_("C-l", "Reload the log view with new commits in the repository"), \
581 	\
582 	KEYMAP_("Diff view", TOG_KEYMAP_DIFF), \
583 	KEY_("K < ,", "Display diff of next line in the file/log entry"), \
584 	KEY_("J > .", "Display diff of previous line in the file/log entry"), \
585 	KEY_("A", "Toggle between Myers and Patience diff algorithm"), \
586 	KEY_("a", "Toggle treatment of file as ASCII irrespective of binary" \
587 	    " data"), \
588 	KEY_("(", "Go to the previous file in the diff"), \
589 	KEY_(")", "Go to the next file in the diff"), \
590 	KEY_("{", "Go to the previous hunk in the diff"), \
591 	KEY_("}", "Go to the next hunk in the diff"), \
592 	KEY_("[", "Decrease the number of context lines"), \
593 	KEY_("]", "Increase the number of context lines"), \
594 	KEY_("w", "Toggle ignore whitespace-only changes in the diff"), \
595 	\
596 	KEYMAP_("Blame view", TOG_KEYMAP_BLAME), \
597 	KEY_("Enter", "Display diff view of the selected line's commit"), \
598 	KEY_("A", "Toggle diff algorithm between Myers and Patience"), \
599 	KEY_("L", "Open log view for the currently selected annotated line"), \
600 	KEY_("C", "Reload view with the previously blamed commit"), \
601 	KEY_("c", "Reload view with the version of the file found in the" \
602 	    " selected line's commit"), \
603 	KEY_("p", "Reload view with the version of the file found in the" \
604 	    " selected line's parent commit"), \
605 	\
606 	KEYMAP_("Tree view", TOG_KEYMAP_TREE), \
607 	KEY_("Enter", "Enter selected directory or open blame view of the" \
608 	    " selected file"), \
609 	KEY_("L", "Open log view for the selected entry"), \
610 	KEY_("R", "Open ref view of all repository references"), \
611 	KEY_("i", "Show object IDs for all tree entries"), \
612 	KEY_("Backspace", "Return to the parent directory"), \
613 	\
614 	KEYMAP_("Ref view", TOG_KEYMAP_REF), \
615 	KEY_("Enter", "Display log view of the selected reference"), \
616 	KEY_("T", "Display tree view of the selected reference"), \
617 	KEY_("i", "Toggle display of IDs for all non-symbolic references"), \
618 	KEY_("m", "Toggle display of last modified date for each reference"), \
619 	KEY_("o", "Toggle reference sort order (name -> timestamp)"), \
620 	KEY_("C-l", "Reload view with all repository references")
621 
622 struct tog_key_map {
623 	const char		*keys;
624 	const char		*info;
625 	enum tog_keymap_type	 type;
626 };
627 
628 /* curses io for tog regress */
629 struct tog_io {
630 	FILE	*cin;
631 	FILE	*cout;
632 	FILE	*f;
633 	FILE	*sdump;
634 	char	*input_str;
635 	int	 wait_for_ui;
636 } tog_io;
637 static int using_mock_io;
638 
639 #define TOG_KEY_SCRDUMP	SHRT_MIN
640 
641 /*
642  * We implement two types of views: parent views and child views.
643  *
644  * The 'Tab' key switches focus between a parent view and its child view.
645  * Child views are shown side-by-side to their parent view, provided
646  * there is enough screen estate.
647  *
648  * When a new view is opened from within a parent view, this new view
649  * becomes a child view of the parent view, replacing any existing child.
650  *
651  * When a new view is opened from within a child view, this new view
652  * becomes a parent view which will obscure the views below until the
653  * user quits the new parent view by typing 'q'.
654  *
655  * This list of views contains parent views only.
656  * Child views are only pointed to by their parent view.
657  */
658 TAILQ_HEAD(tog_view_list_head, tog_view);
659 
660 struct tog_view {
661 	TAILQ_ENTRY(tog_view) entry;
662 	WINDOW *window;
663 	PANEL *panel;
664 	int nlines, ncols, begin_y, begin_x; /* based on split height/width */
665 	int resized_y, resized_x; /* begin_y/x based on user resizing */
666 	int maxx, x; /* max column and current start column */
667 	int lines, cols; /* copies of LINES and COLS */
668 	int nscrolled, offset; /* lines scrolled and hsplit line offset */
669 	int gline, hiline; /* navigate to and highlight this nG line */
670 	int ch, count; /* current keymap and count prefix */
671 	int resized; /* set when in a resize event */
672 	int focussed; /* Only set on one parent or child view at a time. */
673 	int dying;
674 	struct tog_view *parent;
675 	struct tog_view *child;
676 
677 	/*
678 	 * This flag is initially set on parent views when a new child view
679 	 * is created. It gets toggled when the 'Tab' key switches focus
680 	 * between parent and child.
681 	 * The flag indicates whether focus should be passed on to our child
682 	 * view if this parent view gets picked for focus after another parent
683 	 * view was closed. This prevents child views from losing focus in such
684 	 * situations.
685 	 */
686 	int focus_child;
687 
688 	enum tog_view_mode mode;
689 	/* type-specific state */
690 	enum tog_view_type type;
691 	union {
692 		struct tog_diff_view_state diff;
693 		struct tog_log_view_state log;
694 		struct tog_blame_view_state blame;
695 		struct tog_tree_view_state tree;
696 		struct tog_ref_view_state ref;
697 		struct tog_help_view_state help;
698 	} state;
699 
700 	const struct got_error *(*show)(struct tog_view *);
701 	const struct got_error *(*input)(struct tog_view **,
702 	    struct tog_view *, int);
703 	const struct got_error *(*reset)(struct tog_view *);
704 	const struct got_error *(*resize)(struct tog_view *, int);
705 	const struct got_error *(*close)(struct tog_view *);
706 
707 	const struct got_error *(*search_start)(struct tog_view *);
708 	const struct got_error *(*search_next)(struct tog_view *);
709 	void (*search_setup)(struct tog_view *, FILE **, off_t **, size_t *,
710 	    int **, int **, int **, int **);
711 	int search_started;
712 	int searching;
713 #define TOG_SEARCH_FORWARD	1
714 #define TOG_SEARCH_BACKWARD	2
715 	int search_next_done;
716 #define TOG_SEARCH_HAVE_MORE	1
717 #define TOG_SEARCH_NO_MORE	2
718 #define TOG_SEARCH_HAVE_NONE	3
719 	regex_t regex;
720 	regmatch_t regmatch;
721 	const char *action;
722 };
723 
724 static const struct got_error *open_diff_view(struct tog_view *,
725     struct got_object_id *, struct got_object_id *,
726     const char *, const char *, int, int, int, struct tog_view *,
727     struct got_repository *);
728 static const struct got_error *show_diff_view(struct tog_view *);
729 static const struct got_error *input_diff_view(struct tog_view **,
730     struct tog_view *, int);
731 static const struct got_error *reset_diff_view(struct tog_view *);
732 static const struct got_error* close_diff_view(struct tog_view *);
733 static const struct got_error *search_start_diff_view(struct tog_view *);
734 static void search_setup_diff_view(struct tog_view *, FILE **, off_t **,
735     size_t *, int **, int **, int **, int **);
736 static const struct got_error *search_next_view_match(struct tog_view *);
737 
738 static const struct got_error *open_log_view(struct tog_view *,
739     struct got_object_id *, struct got_repository *,
740     const char *, const char *, int, struct got_worktree *);
741 static const struct got_error * show_log_view(struct tog_view *);
742 static const struct got_error *input_log_view(struct tog_view **,
743     struct tog_view *, int);
744 static const struct got_error *resize_log_view(struct tog_view *, int);
745 static const struct got_error *close_log_view(struct tog_view *);
746 static const struct got_error *search_start_log_view(struct tog_view *);
747 static const struct got_error *search_next_log_view(struct tog_view *);
748 
749 static const struct got_error *open_blame_view(struct tog_view *, char *,
750     struct got_object_id *, struct got_repository *);
751 static const struct got_error *show_blame_view(struct tog_view *);
752 static const struct got_error *input_blame_view(struct tog_view **,
753     struct tog_view *, int);
754 static const struct got_error *reset_blame_view(struct tog_view *);
755 static const struct got_error *close_blame_view(struct tog_view *);
756 static const struct got_error *search_start_blame_view(struct tog_view *);
757 static void search_setup_blame_view(struct tog_view *, FILE **, off_t **,
758     size_t *, int **, int **, int **, int **);
759 
760 static const struct got_error *open_tree_view(struct tog_view *,
761     struct got_object_id *, const char *, struct got_repository *);
762 static const struct got_error *show_tree_view(struct tog_view *);
763 static const struct got_error *input_tree_view(struct tog_view **,
764     struct tog_view *, int);
765 static const struct got_error *close_tree_view(struct tog_view *);
766 static const struct got_error *search_start_tree_view(struct tog_view *);
767 static const struct got_error *search_next_tree_view(struct tog_view *);
768 
769 static const struct got_error *open_ref_view(struct tog_view *,
770     struct got_repository *);
771 static const struct got_error *show_ref_view(struct tog_view *);
772 static const struct got_error *input_ref_view(struct tog_view **,
773     struct tog_view *, int);
774 static const struct got_error *close_ref_view(struct tog_view *);
775 static const struct got_error *search_start_ref_view(struct tog_view *);
776 static const struct got_error *search_next_ref_view(struct tog_view *);
777 
778 static const struct got_error *open_help_view(struct tog_view *,
779     struct tog_view *);
780 static const struct got_error *show_help_view(struct tog_view *);
781 static const struct got_error *input_help_view(struct tog_view **,
782     struct tog_view *, int);
783 static const struct got_error *reset_help_view(struct tog_view *);
784 static const struct got_error* close_help_view(struct tog_view *);
785 static const struct got_error *search_start_help_view(struct tog_view *);
786 static void search_setup_help_view(struct tog_view *, FILE **, off_t **,
787     size_t *, int **, int **, int **, int **);
788 
789 static volatile sig_atomic_t tog_sigwinch_received;
790 static volatile sig_atomic_t tog_sigpipe_received;
791 static volatile sig_atomic_t tog_sigcont_received;
792 static volatile sig_atomic_t tog_sigint_received;
793 static volatile sig_atomic_t tog_sigterm_received;
794 
795 static void
796 tog_sigwinch(int signo)
797 {
798 	tog_sigwinch_received = 1;
799 }
800 
801 static void
802 tog_sigpipe(int signo)
803 {
804 	tog_sigpipe_received = 1;
805 }
806 
807 static void
808 tog_sigcont(int signo)
809 {
810 	tog_sigcont_received = 1;
811 }
812 
813 static void
814 tog_sigint(int signo)
815 {
816 	tog_sigint_received = 1;
817 }
818 
819 static void
820 tog_sigterm(int signo)
821 {
822 	tog_sigterm_received = 1;
823 }
824 
825 static int
826 tog_fatal_signal_received(void)
827 {
828 	return (tog_sigpipe_received ||
829 	    tog_sigint_received || tog_sigterm_received);
830 }
831 
832 static const struct got_error *
833 view_close(struct tog_view *view)
834 {
835 	const struct got_error *err = NULL, *child_err = NULL;
836 
837 	if (view->child) {
838 		child_err = view_close(view->child);
839 		view->child = NULL;
840 	}
841 	if (view->close)
842 		err = view->close(view);
843 	if (view->panel)
844 		del_panel(view->panel);
845 	if (view->window)
846 		delwin(view->window);
847 	free(view);
848 	return err ? err : child_err;
849 }
850 
851 static struct tog_view *
852 view_open(int nlines, int ncols, int begin_y, int begin_x,
853     enum tog_view_type type)
854 {
855 	struct tog_view *view = calloc(1, sizeof(*view));
856 
857 	if (view == NULL)
858 		return NULL;
859 
860 	view->type = type;
861 	view->lines = LINES;
862 	view->cols = COLS;
863 	view->nlines = nlines ? nlines : LINES - begin_y;
864 	view->ncols = ncols ? ncols : COLS - begin_x;
865 	view->begin_y = begin_y;
866 	view->begin_x = begin_x;
867 	view->window = newwin(nlines, ncols, begin_y, begin_x);
868 	if (view->window == NULL) {
869 		view_close(view);
870 		return NULL;
871 	}
872 	view->panel = new_panel(view->window);
873 	if (view->panel == NULL ||
874 	    set_panel_userptr(view->panel, view) != OK) {
875 		view_close(view);
876 		return NULL;
877 	}
878 
879 	keypad(view->window, TRUE);
880 	return view;
881 }
882 
883 static int
884 view_split_begin_x(int begin_x)
885 {
886 	if (begin_x > 0 || COLS < 120)
887 		return 0;
888 	return (COLS - MAX(COLS / 2, 80));
889 }
890 
891 /* XXX Stub till we decide what to do. */
892 static int
893 view_split_begin_y(int lines)
894 {
895 	return lines * HSPLIT_SCALE;
896 }
897 
898 static const struct got_error *view_resize(struct tog_view *);
899 
900 static const struct got_error *
901 view_splitscreen(struct tog_view *view)
902 {
903 	const struct got_error *err = NULL;
904 
905 	if (!view->resized && view->mode == TOG_VIEW_SPLIT_HRZN) {
906 		if (view->resized_y && view->resized_y < view->lines)
907 			view->begin_y = view->resized_y;
908 		else
909 			view->begin_y = view_split_begin_y(view->nlines);
910 		view->begin_x = 0;
911 	} else if (!view->resized) {
912 		if (view->resized_x && view->resized_x < view->cols - 1 &&
913 		    view->cols > 119)
914 			view->begin_x = view->resized_x;
915 		else
916 			view->begin_x = view_split_begin_x(0);
917 		view->begin_y = 0;
918 	}
919 	view->nlines = LINES - view->begin_y;
920 	view->ncols = COLS - view->begin_x;
921 	view->lines = LINES;
922 	view->cols = COLS;
923 	err = view_resize(view);
924 	if (err)
925 		return err;
926 
927 	if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN)
928 		view->parent->nlines = view->begin_y;
929 
930 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
931 		return got_error_from_errno("mvwin");
932 
933 	return NULL;
934 }
935 
936 static const struct got_error *
937 view_fullscreen(struct tog_view *view)
938 {
939 	const struct got_error *err = NULL;
940 
941 	view->begin_x = 0;
942 	view->begin_y = view->resized ? view->begin_y : 0;
943 	view->nlines = view->resized ? view->nlines : LINES;
944 	view->ncols = COLS;
945 	view->lines = LINES;
946 	view->cols = COLS;
947 	err = view_resize(view);
948 	if (err)
949 		return err;
950 
951 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
952 		return got_error_from_errno("mvwin");
953 
954 	return NULL;
955 }
956 
957 static int
958 view_is_parent_view(struct tog_view *view)
959 {
960 	return view->parent == NULL;
961 }
962 
963 static int
964 view_is_splitscreen(struct tog_view *view)
965 {
966 	return view->begin_x > 0 || view->begin_y > 0;
967 }
968 
969 static int
970 view_is_fullscreen(struct tog_view *view)
971 {
972 	return view->nlines == LINES && view->ncols == COLS;
973 }
974 
975 static int
976 view_is_hsplit_top(struct tog_view *view)
977 {
978 	return view->mode == TOG_VIEW_SPLIT_HRZN && view->child &&
979 	    view_is_splitscreen(view->child);
980 }
981 
982 static void
983 view_border(struct tog_view *view)
984 {
985 	PANEL *panel;
986 	const struct tog_view *view_above;
987 
988 	if (view->parent)
989 		return view_border(view->parent);
990 
991 	panel = panel_above(view->panel);
992 	if (panel == NULL)
993 		return;
994 
995 	view_above = panel_userptr(panel);
996 	if (view->mode == TOG_VIEW_SPLIT_HRZN)
997 		mvwhline(view->window, view_above->begin_y - 1,
998 		    view->begin_x, ACS_HLINE, view->ncols);
999 	else
1000 		mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
1001 		    ACS_VLINE, view->nlines);
1002 }
1003 
1004 static const struct got_error *view_init_hsplit(struct tog_view *, int);
1005 static const struct got_error *request_log_commits(struct tog_view *);
1006 static const struct got_error *offset_selection_down(struct tog_view *);
1007 static void offset_selection_up(struct tog_view *);
1008 static void view_get_split(struct tog_view *, int *, int *);
1009 
1010 static const struct got_error *
1011 view_resize(struct tog_view *view)
1012 {
1013 	const struct got_error	*err = NULL;
1014 	int			 dif, nlines, ncols;
1015 
1016 	dif = LINES - view->lines;  /* line difference */
1017 
1018 	if (view->lines > LINES)
1019 		nlines = view->nlines - (view->lines - LINES);
1020 	else
1021 		nlines = view->nlines + (LINES - view->lines);
1022 	if (view->cols > COLS)
1023 		ncols = view->ncols - (view->cols - COLS);
1024 	else
1025 		ncols = view->ncols + (COLS - view->cols);
1026 
1027 	if (view->child) {
1028 		int hs = view->child->begin_y;
1029 
1030 		if (!view_is_fullscreen(view))
1031 			view->child->begin_x = view_split_begin_x(view->begin_x);
1032 		if (view->mode == TOG_VIEW_SPLIT_HRZN ||
1033 		    view->child->begin_x == 0) {
1034 			ncols = COLS;
1035 
1036 			view_fullscreen(view->child);
1037 			if (view->child->focussed)
1038 				show_panel(view->child->panel);
1039 			else
1040 				show_panel(view->panel);
1041 		} else {
1042 			ncols = view->child->begin_x;
1043 
1044 			view_splitscreen(view->child);
1045 			show_panel(view->child->panel);
1046 		}
1047 		/*
1048 		 * XXX This is ugly and needs to be moved into the above
1049 		 * logic but "works" for now and my attempts at moving it
1050 		 * break either 'tab' or 'F' key maps in horizontal splits.
1051 		 */
1052 		if (hs) {
1053 			err = view_splitscreen(view->child);
1054 			if (err)
1055 				return err;
1056 			if (dif < 0) { /* top split decreased */
1057 				err = offset_selection_down(view);
1058 				if (err)
1059 					return err;
1060 			}
1061 			view_border(view);
1062 			update_panels();
1063 			doupdate();
1064 			show_panel(view->child->panel);
1065 			nlines = view->nlines;
1066 		}
1067 	} else if (view->parent == NULL)
1068 		ncols = COLS;
1069 
1070 	if (view->resize && dif > 0) {
1071 		err = view->resize(view, dif);
1072 		if (err)
1073 			return err;
1074 	}
1075 
1076 	if (wresize(view->window, nlines, ncols) == ERR)
1077 		return got_error_from_errno("wresize");
1078 	if (replace_panel(view->panel, view->window) == ERR)
1079 		return got_error_from_errno("replace_panel");
1080 	wclear(view->window);
1081 
1082 	view->nlines = nlines;
1083 	view->ncols = ncols;
1084 	view->lines = LINES;
1085 	view->cols = COLS;
1086 
1087 	return NULL;
1088 }
1089 
1090 static const struct got_error *
1091 resize_log_view(struct tog_view *view, int increase)
1092 {
1093 	struct tog_log_view_state	*s = &view->state.log;
1094 	const struct got_error		*err = NULL;
1095 	int				 n = 0;
1096 
1097 	if (s->selected_entry)
1098 		n = s->selected_entry->idx + view->lines - s->selected;
1099 
1100 	/*
1101 	 * Request commits to account for the increased
1102 	 * height so we have enough to populate the view.
1103 	 */
1104 	if (s->commits->ncommits < n) {
1105 		view->nscrolled = n - s->commits->ncommits + increase + 1;
1106 		err = request_log_commits(view);
1107 	}
1108 
1109 	return err;
1110 }
1111 
1112 static void
1113 view_adjust_offset(struct tog_view *view, int n)
1114 {
1115 	if (n == 0)
1116 		return;
1117 
1118 	if (view->parent && view->parent->offset) {
1119 		if (view->parent->offset + n >= 0)
1120 			view->parent->offset += n;
1121 		else
1122 			view->parent->offset = 0;
1123 	} else if (view->offset) {
1124 		if (view->offset - n >= 0)
1125 			view->offset -= n;
1126 		else
1127 			view->offset = 0;
1128 	}
1129 }
1130 
1131 static const struct got_error *
1132 view_resize_split(struct tog_view *view, int resize)
1133 {
1134 	const struct got_error	*err = NULL;
1135 	struct tog_view		*v = NULL;
1136 
1137 	if (view->parent)
1138 		v = view->parent;
1139 	else
1140 		v = view;
1141 
1142 	if (!v->child || !view_is_splitscreen(v->child))
1143 		return NULL;
1144 
1145 	v->resized = v->child->resized = resize;  /* lock for resize event */
1146 
1147 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
1148 		if (v->child->resized_y)
1149 			v->child->begin_y = v->child->resized_y;
1150 		if (view->parent)
1151 			v->child->begin_y -= resize;
1152 		else
1153 			v->child->begin_y += resize;
1154 		if (v->child->begin_y < 3) {
1155 			view->count = 0;
1156 			v->child->begin_y = 3;
1157 		} else if (v->child->begin_y > LINES - 1) {
1158 			view->count = 0;
1159 			v->child->begin_y = LINES - 1;
1160 		}
1161 		v->ncols = COLS;
1162 		v->child->ncols = COLS;
1163 		view_adjust_offset(view, resize);
1164 		err = view_init_hsplit(v, v->child->begin_y);
1165 		if (err)
1166 			return err;
1167 		v->child->resized_y = v->child->begin_y;
1168 	} else {
1169 		if (v->child->resized_x)
1170 			v->child->begin_x = v->child->resized_x;
1171 		if (view->parent)
1172 			v->child->begin_x -= resize;
1173 		else
1174 			v->child->begin_x += resize;
1175 		if (v->child->begin_x < 11) {
1176 			view->count = 0;
1177 			v->child->begin_x = 11;
1178 		} else if (v->child->begin_x > COLS - 1) {
1179 			view->count = 0;
1180 			v->child->begin_x = COLS - 1;
1181 		}
1182 		v->child->resized_x = v->child->begin_x;
1183 	}
1184 
1185 	v->child->mode = v->mode;
1186 	v->child->nlines = v->lines - v->child->begin_y;
1187 	v->child->ncols = v->cols - v->child->begin_x;
1188 	v->focus_child = 1;
1189 
1190 	err = view_fullscreen(v);
1191 	if (err)
1192 		return err;
1193 	err = view_splitscreen(v->child);
1194 	if (err)
1195 		return err;
1196 
1197 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1198 		err = offset_selection_down(v->child);
1199 		if (err)
1200 			return err;
1201 	}
1202 
1203 	if (v->resize)
1204 		err = v->resize(v, 0);
1205 	else if (v->child->resize)
1206 		err = v->child->resize(v->child, 0);
1207 
1208 	v->resized = v->child->resized = 0;
1209 
1210 	return err;
1211 }
1212 
1213 static void
1214 view_transfer_size(struct tog_view *dst, struct tog_view *src)
1215 {
1216 	struct tog_view *v = src->child ? src->child : src;
1217 
1218 	dst->resized_x = v->resized_x;
1219 	dst->resized_y = v->resized_y;
1220 }
1221 
1222 static const struct got_error *
1223 view_close_child(struct tog_view *view)
1224 {
1225 	const struct got_error *err = NULL;
1226 
1227 	if (view->child == NULL)
1228 		return NULL;
1229 
1230 	err = view_close(view->child);
1231 	view->child = NULL;
1232 	return err;
1233 }
1234 
1235 static const struct got_error *
1236 view_set_child(struct tog_view *view, struct tog_view *child)
1237 {
1238 	const struct got_error *err = NULL;
1239 
1240 	view->child = child;
1241 	child->parent = view;
1242 
1243 	err = view_resize(view);
1244 	if (err)
1245 		return err;
1246 
1247 	if (view->child->resized_x || view->child->resized_y)
1248 		err = view_resize_split(view, 0);
1249 
1250 	return err;
1251 }
1252 
1253 static const struct got_error *view_dispatch_request(struct tog_view **,
1254     struct tog_view *, enum tog_view_type, int, int);
1255 
1256 static const struct got_error *
1257 view_request_new(struct tog_view **requested, struct tog_view *view,
1258     enum tog_view_type request)
1259 {
1260 	struct tog_view		*new_view = NULL;
1261 	const struct got_error	*err;
1262 	int			 y = 0, x = 0;
1263 
1264 	*requested = NULL;
1265 
1266 	if (view_is_parent_view(view) && request != TOG_VIEW_HELP)
1267 		view_get_split(view, &y, &x);
1268 
1269 	err = view_dispatch_request(&new_view, view, request, y, x);
1270 	if (err)
1271 		return err;
1272 
1273 	if (view_is_parent_view(view) && view->mode == TOG_VIEW_SPLIT_HRZN &&
1274 	    request != TOG_VIEW_HELP) {
1275 		err = view_init_hsplit(view, y);
1276 		if (err)
1277 			return err;
1278 	}
1279 
1280 	view->focussed = 0;
1281 	new_view->focussed = 1;
1282 	new_view->mode = view->mode;
1283 	new_view->nlines = request == TOG_VIEW_HELP ?
1284 	    view->lines : view->lines - y;
1285 
1286 	if (view_is_parent_view(view) && request != TOG_VIEW_HELP) {
1287 		view_transfer_size(new_view, view);
1288 		err = view_close_child(view);
1289 		if (err)
1290 			return err;
1291 		err = view_set_child(view, new_view);
1292 		if (err)
1293 			return err;
1294 		view->focus_child = 1;
1295 	} else
1296 		*requested = new_view;
1297 
1298 	return NULL;
1299 }
1300 
1301 static void
1302 tog_resizeterm(void)
1303 {
1304 	int cols, lines;
1305 	struct winsize size;
1306 
1307 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
1308 		cols = 80;     /* Default */
1309 		lines = 24;
1310 	} else {
1311 		cols = size.ws_col;
1312 		lines = size.ws_row;
1313 	}
1314 	resize_term(lines, cols);
1315 }
1316 
1317 static const struct got_error *
1318 view_search_start(struct tog_view *view, int fast_refresh)
1319 {
1320 	const struct got_error *err = NULL;
1321 	struct tog_view *v = view;
1322 	char pattern[1024];
1323 	int ret;
1324 
1325 	if (view->search_started) {
1326 		regfree(&view->regex);
1327 		view->searching = 0;
1328 		memset(&view->regmatch, 0, sizeof(view->regmatch));
1329 	}
1330 	view->search_started = 0;
1331 
1332 	if (view->nlines < 1)
1333 		return NULL;
1334 
1335 	if (view_is_hsplit_top(view))
1336 		v = view->child;
1337 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1338 		v = view->parent;
1339 
1340 	if (tog_io.input_str != NULL) {
1341 		if (strlcpy(pattern, tog_io.input_str, sizeof(pattern)) >=
1342 		    sizeof(pattern))
1343 			return got_error(GOT_ERR_NO_SPACE);
1344 	} else {
1345 		mvwaddstr(v->window, v->nlines - 1, 0, "/");
1346 		wclrtoeol(v->window);
1347 		nodelay(v->window, FALSE);  /* block for search term input */
1348 		nocbreak();
1349 		echo();
1350 		ret = wgetnstr(v->window, pattern, sizeof(pattern));
1351 		wrefresh(v->window);
1352 		cbreak();
1353 		noecho();
1354 		nodelay(v->window, TRUE);
1355 		if (!fast_refresh && !using_mock_io)
1356 			halfdelay(10);
1357 		if (ret == ERR)
1358 			return NULL;
1359 	}
1360 
1361 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
1362 		err = view->search_start(view);
1363 		if (err) {
1364 			regfree(&view->regex);
1365 			return err;
1366 		}
1367 		view->search_started = 1;
1368 		view->searching = TOG_SEARCH_FORWARD;
1369 		view->search_next_done = 0;
1370 		view->search_next(view);
1371 	}
1372 
1373 	return NULL;
1374 }
1375 
1376 /* Switch split mode. If view is a parent or child, draw the new splitscreen. */
1377 static const struct got_error *
1378 switch_split(struct tog_view *view)
1379 {
1380 	const struct got_error	*err = NULL;
1381 	struct tog_view		*v = NULL;
1382 
1383 	if (view->parent)
1384 		v = view->parent;
1385 	else
1386 		v = view;
1387 
1388 	if (v->mode == TOG_VIEW_SPLIT_HRZN)
1389 		v->mode = TOG_VIEW_SPLIT_VERT;
1390 	else
1391 		v->mode = TOG_VIEW_SPLIT_HRZN;
1392 
1393 	if (!v->child)
1394 		return NULL;
1395 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->cols < 120)
1396 		v->mode = TOG_VIEW_SPLIT_NONE;
1397 
1398 	view_get_split(v, &v->child->begin_y, &v->child->begin_x);
1399 	if (v->mode == TOG_VIEW_SPLIT_HRZN && v->child->resized_y)
1400 		v->child->begin_y = v->child->resized_y;
1401 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->child->resized_x)
1402 		v->child->begin_x = v->child->resized_x;
1403 
1404 
1405 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1406 		v->ncols = COLS;
1407 		v->child->ncols = COLS;
1408 		v->child->nscrolled = LINES - v->child->nlines;
1409 
1410 		err = view_init_hsplit(v, v->child->begin_y);
1411 		if (err)
1412 			return err;
1413 	}
1414 	v->child->mode = v->mode;
1415 	v->child->nlines = v->lines - v->child->begin_y;
1416 	v->focus_child = 1;
1417 
1418 	err = view_fullscreen(v);
1419 	if (err)
1420 		return err;
1421 	err = view_splitscreen(v->child);
1422 	if (err)
1423 		return err;
1424 
1425 	if (v->mode == TOG_VIEW_SPLIT_NONE)
1426 		v->mode = TOG_VIEW_SPLIT_VERT;
1427 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1428 		err = offset_selection_down(v);
1429 		if (err)
1430 			return err;
1431 		err = offset_selection_down(v->child);
1432 		if (err)
1433 			return err;
1434 	} else {
1435 		offset_selection_up(v);
1436 		offset_selection_up(v->child);
1437 	}
1438 	if (v->resize)
1439 		err = v->resize(v, 0);
1440 	else if (v->child->resize)
1441 		err = v->child->resize(v->child, 0);
1442 
1443 	return err;
1444 }
1445 
1446 /*
1447  * Strip trailing whitespace from str starting at byte *n;
1448  * if *n < 0, use strlen(str). Return new str length in *n.
1449  */
1450 static void
1451 strip_trailing_ws(char *str, int *n)
1452 {
1453 	size_t x = *n;
1454 
1455 	if (str == NULL || *str == '\0')
1456 		return;
1457 
1458 	if (x < 0)
1459 		x = strlen(str);
1460 
1461 	while (x-- > 0 && isspace((unsigned char)str[x]))
1462 		str[x] = '\0';
1463 
1464 	*n = x + 1;
1465 }
1466 
1467 /*
1468  * Extract visible substring of line y from the curses screen
1469  * and strip trailing whitespace. If vline is set, overwrite
1470  * line[vline] with '|' because the ACS_VLINE character is
1471  * written out as 'x'. Write the line to file f.
1472  */
1473 static const struct got_error *
1474 view_write_line(FILE *f, int y, int vline)
1475 {
1476 	char	line[COLS * MB_LEN_MAX];  /* allow for multibyte chars */
1477 	int	r, w;
1478 
1479 	r = mvwinnstr(curscr, y, 0, line, sizeof(line));
1480 	if (r == ERR)
1481 		return got_error_fmt(GOT_ERR_RANGE,
1482 		    "failed to extract line %d", y);
1483 
1484 	/*
1485 	 * In some views, lines are padded with blanks to COLS width.
1486 	 * Strip them so we can diff without the -b flag when testing.
1487 	 */
1488 	strip_trailing_ws(line, &r);
1489 
1490 	if (vline > 0)
1491 		line[vline] = '|';
1492 
1493 	w = fprintf(f, "%s\n", line);
1494 	if (w != r + 1)		/* \n */
1495 		return got_ferror(f, GOT_ERR_IO);
1496 
1497 	return NULL;
1498 }
1499 
1500 /*
1501  * Capture the visible curses screen by writing each line to the
1502  * file at the path set via the TOG_SCR_DUMP environment variable.
1503  */
1504 static const struct got_error *
1505 screendump(struct tog_view *view)
1506 {
1507 	const struct got_error	*err;
1508 	int			 i;
1509 
1510 	err = got_opentemp_truncate(tog_io.sdump);
1511 	if (err)
1512 		return err;
1513 
1514 	if ((view->child && view->child->begin_x) ||
1515 	    (view->parent && view->begin_x)) {
1516 		int ncols = view->child ? view->ncols : view->parent->ncols;
1517 
1518 		/* vertical splitscreen */
1519 		for (i = 0; i < view->nlines; ++i) {
1520 			err = view_write_line(tog_io.sdump, i, ncols - 1);
1521 			if (err)
1522 				goto done;
1523 		}
1524 	} else {
1525 		int hline = 0;
1526 
1527 		/* fullscreen or horizontal splitscreen */
1528 		if ((view->child && view->child->begin_y) ||
1529 		    (view->parent && view->begin_y))	/* hsplit */
1530 			hline = view->child ?
1531 			    view->child->begin_y : view->begin_y;
1532 
1533 		for (i = 0; i < view->lines; i++) {
1534 			if (hline && i == hline - 1) {
1535 				int c;
1536 
1537 				/* ACS_HLINE writes out as 'q', overwrite it */
1538 				for (c = 0; c < view->cols; ++c)
1539 					fputc('-', tog_io.sdump);
1540 				fputc('\n', tog_io.sdump);
1541 				continue;
1542 			}
1543 
1544 			err = view_write_line(tog_io.sdump, i, 0);
1545 			if (err)
1546 				goto done;
1547 		}
1548 	}
1549 
1550 done:
1551 	return err;
1552 }
1553 
1554 /*
1555  * Compute view->count from numeric input. Assign total to view->count and
1556  * return first non-numeric key entered.
1557  */
1558 static int
1559 get_compound_key(struct tog_view *view, int c)
1560 {
1561 	struct tog_view	*v = view;
1562 	int		 x, n = 0;
1563 
1564 	if (view_is_hsplit_top(view))
1565 		v = view->child;
1566 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1567 		v = view->parent;
1568 
1569 	view->count = 0;
1570 	cbreak();  /* block for input */
1571 	nodelay(view->window, FALSE);
1572 	wmove(v->window, v->nlines - 1, 0);
1573 	wclrtoeol(v->window);
1574 	waddch(v->window, ':');
1575 
1576 	do {
1577 		x = getcurx(v->window);
1578 		if (x != ERR && x < view->ncols) {
1579 			waddch(v->window, c);
1580 			wrefresh(v->window);
1581 		}
1582 
1583 		/*
1584 		 * Don't overflow. Max valid request should be the greatest
1585 		 * between the longest and total lines; cap at 10 million.
1586 		 */
1587 		if (n >= 9999999)
1588 			n = 9999999;
1589 		else
1590 			n = n * 10 + (c - '0');
1591 	} while (((c = wgetch(view->window))) >= '0' && c <= '9' && c != ERR);
1592 
1593 	if (c == 'G' || c == 'g') {	/* nG key map */
1594 		view->gline = view->hiline = n;
1595 		n = 0;
1596 		c = 0;
1597 	}
1598 
1599 	/* Massage excessive or inapplicable values at the input handler. */
1600 	view->count = n;
1601 
1602 	return c;
1603 }
1604 
1605 static void
1606 action_report(struct tog_view *view)
1607 {
1608 	struct tog_view *v = view;
1609 
1610 	if (view_is_hsplit_top(view))
1611 		v = view->child;
1612 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1613 		v = view->parent;
1614 
1615 	wmove(v->window, v->nlines - 1, 0);
1616 	wclrtoeol(v->window);
1617 	wprintw(v->window, ":%s", view->action);
1618 	wrefresh(v->window);
1619 
1620 	/*
1621 	 * Clear action status report. Only clear in blame view
1622 	 * once annotating is complete, otherwise it's too fast.
1623 	 */
1624 	if (view->type == TOG_VIEW_BLAME) {
1625 		if (view->state.blame.blame_complete)
1626 			view->action = NULL;
1627 	} else
1628 		view->action = NULL;
1629 }
1630 
1631 /*
1632  * Read the next line from the test script and assign
1633  * key instruction to *ch. If at EOF, set the *done flag.
1634  */
1635 static const struct got_error *
1636 tog_read_script_key(FILE *script, struct tog_view *view, int *ch, int *done)
1637 {
1638 	const struct got_error	*err = NULL;
1639 	char			*line = NULL;
1640 	size_t			 linesz = 0;
1641 	ssize_t			 n;
1642 
1643 
1644 	if (view->count && --view->count) {
1645 		*ch = view->ch;
1646 		return NULL;
1647 	} else
1648 		*ch = -1;
1649 
1650 	if ((n = getline(&line, &linesz, script)) == -1) {
1651 		if (feof(script)) {
1652 			*done = 1;
1653 			goto done;
1654 		} else {
1655 			err = got_ferror(script, GOT_ERR_IO);
1656 			goto done;
1657 		}
1658 	}
1659 
1660 	if (strncasecmp(line, "WAIT_FOR_UI", 11) == 0)
1661 		tog_io.wait_for_ui = 1;
1662 	else if (strncasecmp(line, "KEY_ENTER", 9) == 0)
1663 		*ch = KEY_ENTER;
1664 	else if (strncasecmp(line, "KEY_RIGHT", 9) == 0)
1665 		*ch = KEY_RIGHT;
1666 	else if (strncasecmp(line, "KEY_LEFT", 8) == 0)
1667 		*ch = KEY_LEFT;
1668 	else if (strncasecmp(line, "KEY_DOWN", 8) == 0)
1669 		*ch = KEY_DOWN;
1670 	else if (strncasecmp(line, "KEY_UP", 6) == 0)
1671 		*ch = KEY_UP;
1672 	else if (strncasecmp(line, "TAB", 3) == 0)
1673 		*ch = '\t';
1674 	else if (strncasecmp(line, "SCREENDUMP", 10) == 0)
1675 		*ch = TOG_KEY_SCRDUMP;
1676 	else if (isdigit((unsigned char)*line)) {
1677 		char *t = line;
1678 
1679 		while (isdigit((unsigned char)*t))
1680 			++t;
1681 		view->ch = *ch = *t;
1682 		*t = '\0';
1683 		/* ignore error, view->count is 0 if instruction is invalid */
1684 		view->count = strtonum(line, 0, INT_MAX, NULL);
1685 	} else {
1686 		*ch = *line;
1687 		if (n > 2 && (*ch == '/' || *ch == '&')) {
1688 			/* skip leading keymap and trim trailing newline */
1689 			tog_io.input_str = strndup(line + 1, n - 2);
1690 			if (tog_io.input_str == NULL) {
1691 				err = got_error_from_errno("strndup");
1692 				goto done;
1693 			}
1694 		}
1695 	}
1696 
1697 done:
1698 	free(line);
1699 	return err;
1700 }
1701 
1702 static const struct got_error *
1703 view_input(struct tog_view **new, int *done, struct tog_view *view,
1704     struct tog_view_list_head *views, int fast_refresh)
1705 {
1706 	const struct got_error *err = NULL;
1707 	struct tog_view *v;
1708 	int ch, errcode;
1709 
1710 	*new = NULL;
1711 
1712 	if (view->action)
1713 		action_report(view);
1714 
1715 	/* Clear "no matches" indicator. */
1716 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
1717 	    view->search_next_done == TOG_SEARCH_HAVE_NONE) {
1718 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
1719 		view->count = 0;
1720 	}
1721 
1722 	if (view->searching && !view->search_next_done) {
1723 		view->search_next(view);
1724 		return NULL;
1725 	}
1726 
1727 	/* Allow threads to make progress while we are waiting for input. */
1728 	errcode = pthread_mutex_unlock(&tog_mutex);
1729 	if (errcode)
1730 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
1731 
1732 	if (using_mock_io) {
1733 		err = tog_read_script_key(tog_io.f, view, &ch, done);
1734 		if (err) {
1735 			errcode = pthread_mutex_lock(&tog_mutex);
1736 			return err;
1737 		}
1738 	} else if (view->count && --view->count) {
1739 		cbreak();
1740 		nodelay(view->window, TRUE);
1741 		ch = wgetch(view->window);
1742 		/* let C-g or backspace abort unfinished count */
1743 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
1744 			view->count = 0;
1745 		else
1746 			ch = view->ch;
1747 	} else {
1748 		ch = wgetch(view->window);
1749 		if (ch >= '1' && ch  <= '9')
1750 			view->ch = ch = get_compound_key(view, ch);
1751 	}
1752 	if (view->hiline && ch != ERR && ch != 0)
1753 		view->hiline = 0;  /* key pressed, clear line highlight */
1754 	nodelay(view->window, TRUE);
1755 	errcode = pthread_mutex_lock(&tog_mutex);
1756 	if (errcode)
1757 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1758 
1759 	if (tog_sigwinch_received || tog_sigcont_received) {
1760 		tog_resizeterm();
1761 		tog_sigwinch_received = 0;
1762 		tog_sigcont_received = 0;
1763 		TAILQ_FOREACH(v, views, entry) {
1764 			err = view_resize(v);
1765 			if (err)
1766 				return err;
1767 			err = v->input(new, v, KEY_RESIZE);
1768 			if (err)
1769 				return err;
1770 			if (v->child) {
1771 				err = view_resize(v->child);
1772 				if (err)
1773 					return err;
1774 				err = v->child->input(new, v->child,
1775 				    KEY_RESIZE);
1776 				if (err)
1777 					return err;
1778 				if (v->child->resized_x || v->child->resized_y) {
1779 					err = view_resize_split(v, 0);
1780 					if (err)
1781 						return err;
1782 				}
1783 			}
1784 		}
1785 	}
1786 
1787 	switch (ch) {
1788 	case '?':
1789 	case 'H':
1790 	case KEY_F(1):
1791 		if (view->type == TOG_VIEW_HELP)
1792 			err = view->reset(view);
1793 		else
1794 			err = view_request_new(new, view, TOG_VIEW_HELP);
1795 		break;
1796 	case '\t':
1797 		view->count = 0;
1798 		if (view->child) {
1799 			view->focussed = 0;
1800 			view->child->focussed = 1;
1801 			view->focus_child = 1;
1802 		} else if (view->parent) {
1803 			view->focussed = 0;
1804 			view->parent->focussed = 1;
1805 			view->parent->focus_child = 0;
1806 			if (!view_is_splitscreen(view)) {
1807 				if (view->parent->resize) {
1808 					err = view->parent->resize(view->parent,
1809 					    0);
1810 					if (err)
1811 						return err;
1812 				}
1813 				offset_selection_up(view->parent);
1814 				err = view_fullscreen(view->parent);
1815 				if (err)
1816 					return err;
1817 			}
1818 		}
1819 		break;
1820 	case 'q':
1821 		if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN) {
1822 			if (view->parent->resize) {
1823 				/* might need more commits to fill fullscreen */
1824 				err = view->parent->resize(view->parent, 0);
1825 				if (err)
1826 					break;
1827 			}
1828 			offset_selection_up(view->parent);
1829 		}
1830 		err = view->input(new, view, ch);
1831 		view->dying = 1;
1832 		break;
1833 	case 'Q':
1834 		*done = 1;
1835 		break;
1836 	case 'F':
1837 		view->count = 0;
1838 		if (view_is_parent_view(view)) {
1839 			if (view->child == NULL)
1840 				break;
1841 			if (view_is_splitscreen(view->child)) {
1842 				view->focussed = 0;
1843 				view->child->focussed = 1;
1844 				err = view_fullscreen(view->child);
1845 			} else {
1846 				err = view_splitscreen(view->child);
1847 				if (!err)
1848 					err = view_resize_split(view, 0);
1849 			}
1850 			if (err)
1851 				break;
1852 			err = view->child->input(new, view->child,
1853 			    KEY_RESIZE);
1854 		} else {
1855 			if (view_is_splitscreen(view)) {
1856 				view->parent->focussed = 0;
1857 				view->focussed = 1;
1858 				err = view_fullscreen(view);
1859 			} else {
1860 				err = view_splitscreen(view);
1861 				if (!err && view->mode != TOG_VIEW_SPLIT_HRZN)
1862 					err = view_resize(view->parent);
1863 				if (!err)
1864 					err = view_resize_split(view, 0);
1865 			}
1866 			if (err)
1867 				break;
1868 			err = view->input(new, view, KEY_RESIZE);
1869 		}
1870 		if (err)
1871 			break;
1872 		if (view->resize) {
1873 			err = view->resize(view, 0);
1874 			if (err)
1875 				break;
1876 		}
1877 		if (view->parent) {
1878 			if (view->parent->resize) {
1879 				err = view->parent->resize(view->parent, 0);
1880 				if (err != NULL)
1881 					break;
1882 			}
1883 			err = offset_selection_down(view->parent);
1884 			if (err != NULL)
1885 				break;
1886 		}
1887 		err = offset_selection_down(view);
1888 		break;
1889 	case 'S':
1890 		view->count = 0;
1891 		err = switch_split(view);
1892 		break;
1893 	case '-':
1894 		err = view_resize_split(view, -1);
1895 		break;
1896 	case '+':
1897 		err = view_resize_split(view, 1);
1898 		break;
1899 	case KEY_RESIZE:
1900 		break;
1901 	case '/':
1902 		view->count = 0;
1903 		if (view->search_start)
1904 			view_search_start(view, fast_refresh);
1905 		else
1906 			err = view->input(new, view, ch);
1907 		break;
1908 	case 'N':
1909 	case 'n':
1910 		if (view->search_started && view->search_next) {
1911 			view->searching = (ch == 'n' ?
1912 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1913 			view->search_next_done = 0;
1914 			view->search_next(view);
1915 		} else
1916 			err = view->input(new, view, ch);
1917 		break;
1918 	case 'A':
1919 		if (tog_diff_algo == GOT_DIFF_ALGORITHM_MYERS) {
1920 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
1921 			view->action = "Patience diff algorithm";
1922 		} else {
1923 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
1924 			view->action = "Myers diff algorithm";
1925 		}
1926 		TAILQ_FOREACH(v, views, entry) {
1927 			if (v->reset) {
1928 				err = v->reset(v);
1929 				if (err)
1930 					return err;
1931 			}
1932 			if (v->child && v->child->reset) {
1933 				err = v->child->reset(v->child);
1934 				if (err)
1935 					return err;
1936 			}
1937 		}
1938 		break;
1939 	case TOG_KEY_SCRDUMP:
1940 		err = screendump(view);
1941 		break;
1942 	default:
1943 		err = view->input(new, view, ch);
1944 		break;
1945 	}
1946 
1947 	return err;
1948 }
1949 
1950 static int
1951 view_needs_focus_indication(struct tog_view *view)
1952 {
1953 	if (view_is_parent_view(view)) {
1954 		if (view->child == NULL || view->child->focussed)
1955 			return 0;
1956 		if (!view_is_splitscreen(view->child))
1957 			return 0;
1958 	} else if (!view_is_splitscreen(view))
1959 		return 0;
1960 
1961 	return view->focussed;
1962 }
1963 
1964 static const struct got_error *
1965 tog_io_close(void)
1966 {
1967 	const struct got_error *err = NULL;
1968 
1969 	if (tog_io.cin && fclose(tog_io.cin) == EOF)
1970 		err = got_ferror(tog_io.cin, GOT_ERR_IO);
1971 	if (tog_io.cout && fclose(tog_io.cout) == EOF && err == NULL)
1972 		err = got_ferror(tog_io.cout, GOT_ERR_IO);
1973 	if (tog_io.f && fclose(tog_io.f) == EOF && err == NULL)
1974 		err = got_ferror(tog_io.f, GOT_ERR_IO);
1975 	if (tog_io.sdump && fclose(tog_io.sdump) == EOF && err == NULL)
1976 		err = got_ferror(tog_io.sdump, GOT_ERR_IO);
1977 	if (tog_io.input_str != NULL)
1978 		free(tog_io.input_str);
1979 
1980 	return err;
1981 }
1982 
1983 static const struct got_error *
1984 view_loop(struct tog_view *view)
1985 {
1986 	const struct got_error *err = NULL;
1987 	struct tog_view_list_head views;
1988 	struct tog_view *new_view;
1989 	char *mode;
1990 	int fast_refresh = 10;
1991 	int done = 0, errcode;
1992 
1993 	mode = getenv("TOG_VIEW_SPLIT_MODE");
1994 	if (!mode || !(*mode == 'h' || *mode == 'H'))
1995 		view->mode = TOG_VIEW_SPLIT_VERT;
1996 	else
1997 		view->mode = TOG_VIEW_SPLIT_HRZN;
1998 
1999 	errcode = pthread_mutex_lock(&tog_mutex);
2000 	if (errcode)
2001 		return got_error_set_errno(errcode, "pthread_mutex_lock");
2002 
2003 	TAILQ_INIT(&views);
2004 	TAILQ_INSERT_HEAD(&views, view, entry);
2005 
2006 	view->focussed = 1;
2007 	err = view->show(view);
2008 	if (err)
2009 		return err;
2010 	update_panels();
2011 	doupdate();
2012 	while (!TAILQ_EMPTY(&views) && !done && !tog_thread_error &&
2013 	    !tog_fatal_signal_received()) {
2014 		/* Refresh fast during initialization, then become slower. */
2015 		if (fast_refresh && --fast_refresh == 0 && !using_mock_io)
2016 			halfdelay(10); /* switch to once per second */
2017 
2018 		err = view_input(&new_view, &done, view, &views, fast_refresh);
2019 		if (err)
2020 			break;
2021 
2022 		if (view->dying && view == TAILQ_FIRST(&views) &&
2023 		    TAILQ_NEXT(view, entry) == NULL)
2024 			done = 1;
2025 		if (done) {
2026 			struct tog_view *v;
2027 
2028 			/*
2029 			 * When we quit, scroll the screen up a single line
2030 			 * so we don't lose any information.
2031 			 */
2032 			TAILQ_FOREACH(v, &views, entry) {
2033 				wmove(v->window, 0, 0);
2034 				wdeleteln(v->window);
2035 				wnoutrefresh(v->window);
2036 				if (v->child && !view_is_fullscreen(v)) {
2037 					wmove(v->child->window, 0, 0);
2038 					wdeleteln(v->child->window);
2039 					wnoutrefresh(v->child->window);
2040 				}
2041 			}
2042 			doupdate();
2043 		}
2044 
2045 		if (view->dying) {
2046 			struct tog_view *v, *prev = NULL;
2047 
2048 			if (view_is_parent_view(view))
2049 				prev = TAILQ_PREV(view, tog_view_list_head,
2050 				    entry);
2051 			else if (view->parent)
2052 				prev = view->parent;
2053 
2054 			if (view->parent) {
2055 				view->parent->child = NULL;
2056 				view->parent->focus_child = 0;
2057 				/* Restore fullscreen line height. */
2058 				view->parent->nlines = view->parent->lines;
2059 				err = view_resize(view->parent);
2060 				if (err)
2061 					break;
2062 				/* Make resized splits persist. */
2063 				view_transfer_size(view->parent, view);
2064 			} else
2065 				TAILQ_REMOVE(&views, view, entry);
2066 
2067 			err = view_close(view);
2068 			if (err)
2069 				goto done;
2070 
2071 			view = NULL;
2072 			TAILQ_FOREACH(v, &views, entry) {
2073 				if (v->focussed)
2074 					break;
2075 			}
2076 			if (view == NULL && new_view == NULL) {
2077 				/* No view has focus. Try to pick one. */
2078 				if (prev)
2079 					view = prev;
2080 				else if (!TAILQ_EMPTY(&views)) {
2081 					view = TAILQ_LAST(&views,
2082 					    tog_view_list_head);
2083 				}
2084 				if (view) {
2085 					if (view->focus_child) {
2086 						view->child->focussed = 1;
2087 						view = view->child;
2088 					} else
2089 						view->focussed = 1;
2090 				}
2091 			}
2092 		}
2093 		if (new_view) {
2094 			struct tog_view *v, *t;
2095 			/* Only allow one parent view per type. */
2096 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
2097 				if (v->type != new_view->type)
2098 					continue;
2099 				TAILQ_REMOVE(&views, v, entry);
2100 				err = view_close(v);
2101 				if (err)
2102 					goto done;
2103 				break;
2104 			}
2105 			TAILQ_INSERT_TAIL(&views, new_view, entry);
2106 			view = new_view;
2107 		}
2108 		if (view && !done) {
2109 			if (view_is_parent_view(view)) {
2110 				if (view->child && view->child->focussed)
2111 					view = view->child;
2112 			} else {
2113 				if (view->parent && view->parent->focussed)
2114 					view = view->parent;
2115 			}
2116 			show_panel(view->panel);
2117 			if (view->child && view_is_splitscreen(view->child))
2118 				show_panel(view->child->panel);
2119 			if (view->parent && view_is_splitscreen(view)) {
2120 				err = view->parent->show(view->parent);
2121 				if (err)
2122 					goto done;
2123 			}
2124 			err = view->show(view);
2125 			if (err)
2126 				goto done;
2127 			if (view->child) {
2128 				err = view->child->show(view->child);
2129 				if (err)
2130 					goto done;
2131 			}
2132 			update_panels();
2133 			doupdate();
2134 		}
2135 	}
2136 done:
2137 	while (!TAILQ_EMPTY(&views)) {
2138 		const struct got_error *close_err;
2139 		view = TAILQ_FIRST(&views);
2140 		TAILQ_REMOVE(&views, view, entry);
2141 		close_err = view_close(view);
2142 		if (close_err && err == NULL)
2143 			err = close_err;
2144 	}
2145 
2146 	errcode = pthread_mutex_unlock(&tog_mutex);
2147 	if (errcode && err == NULL)
2148 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
2149 
2150 	return err;
2151 }
2152 
2153 __dead static void
2154 usage_log(void)
2155 {
2156 	endwin();
2157 	fprintf(stderr,
2158 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
2159 	    getprogname());
2160 	exit(1);
2161 }
2162 
2163 /* Create newly allocated wide-character string equivalent to a byte string. */
2164 static const struct got_error *
2165 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
2166 {
2167 	char *vis = NULL;
2168 	const struct got_error *err = NULL;
2169 
2170 	*ws = NULL;
2171 	*wlen = mbstowcs(NULL, s, 0);
2172 	if (*wlen == (size_t)-1) {
2173 		int vislen;
2174 		if (errno != EILSEQ)
2175 			return got_error_from_errno("mbstowcs");
2176 
2177 		/* byte string invalid in current encoding; try to "fix" it */
2178 		err = got_mbsavis(&vis, &vislen, s);
2179 		if (err)
2180 			return err;
2181 		*wlen = mbstowcs(NULL, vis, 0);
2182 		if (*wlen == (size_t)-1) {
2183 			err = got_error_from_errno("mbstowcs"); /* give up */
2184 			goto done;
2185 		}
2186 	}
2187 
2188 	*ws = calloc(*wlen + 1, sizeof(**ws));
2189 	if (*ws == NULL) {
2190 		err = got_error_from_errno("calloc");
2191 		goto done;
2192 	}
2193 
2194 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
2195 		err = got_error_from_errno("mbstowcs");
2196 done:
2197 	free(vis);
2198 	if (err) {
2199 		free(*ws);
2200 		*ws = NULL;
2201 		*wlen = 0;
2202 	}
2203 	return err;
2204 }
2205 
2206 static const struct got_error *
2207 expand_tab(char **ptr, const char *src)
2208 {
2209 	char	*dst;
2210 	size_t	 len, n, idx = 0, sz = 0;
2211 
2212 	*ptr = NULL;
2213 	n = len = strlen(src);
2214 	dst = malloc(n + 1);
2215 	if (dst == NULL)
2216 		return got_error_from_errno("malloc");
2217 
2218 	while (idx < len && src[idx]) {
2219 		const char c = src[idx];
2220 
2221 		if (c == '\t') {
2222 			size_t nb = TABSIZE - sz % TABSIZE;
2223 			char *p;
2224 
2225 			p = realloc(dst, n + nb);
2226 			if (p == NULL) {
2227 				free(dst);
2228 				return got_error_from_errno("realloc");
2229 
2230 			}
2231 			dst = p;
2232 			n += nb;
2233 			memset(dst + sz, ' ', nb);
2234 			sz += nb;
2235 		} else
2236 			dst[sz++] = src[idx];
2237 		++idx;
2238 	}
2239 
2240 	dst[sz] = '\0';
2241 	*ptr = dst;
2242 	return NULL;
2243 }
2244 
2245 /*
2246  * Advance at most n columns from wline starting at offset off.
2247  * Return the index to the first character after the span operation.
2248  * Return the combined column width of all spanned wide characters in
2249  * *rcol.
2250  */
2251 static int
2252 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
2253 {
2254 	int width, i, cols = 0;
2255 
2256 	if (n == 0) {
2257 		*rcol = cols;
2258 		return off;
2259 	}
2260 
2261 	for (i = off; wline[i] != L'\0'; ++i) {
2262 		if (wline[i] == L'\t')
2263 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
2264 		else
2265 			width = wcwidth(wline[i]);
2266 
2267 		if (width == -1) {
2268 			width = 1;
2269 			wline[i] = L'.';
2270 		}
2271 
2272 		if (cols + width > n)
2273 			break;
2274 		cols += width;
2275 	}
2276 
2277 	*rcol = cols;
2278 	return i;
2279 }
2280 
2281 /*
2282  * Format a line for display, ensuring that it won't overflow a width limit.
2283  * With scrolling, the width returned refers to the scrolled version of the
2284  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
2285  */
2286 static const struct got_error *
2287 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
2288     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
2289 {
2290 	const struct got_error *err = NULL;
2291 	int cols;
2292 	wchar_t *wline = NULL;
2293 	char *exstr = NULL;
2294 	size_t wlen;
2295 	int i, scrollx;
2296 
2297 	*wlinep = NULL;
2298 	*widthp = 0;
2299 
2300 	if (expand) {
2301 		err = expand_tab(&exstr, line);
2302 		if (err)
2303 			return err;
2304 	}
2305 
2306 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
2307 	free(exstr);
2308 	if (err)
2309 		return err;
2310 
2311 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
2312 		wline[wlen - 1] = L'\0';
2313 		wlen--;
2314 	}
2315 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
2316 		wline[wlen - 1] = L'\0';
2317 		wlen--;
2318 	}
2319 
2320 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
2321 
2322 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
2323 	wline[i] = L'\0';
2324 
2325 	if (widthp)
2326 		*widthp = cols;
2327 	if (scrollxp)
2328 		*scrollxp = scrollx;
2329 	if (err)
2330 		free(wline);
2331 	else
2332 		*wlinep = wline;
2333 	return err;
2334 }
2335 
2336 static const struct got_error*
2337 build_refs_str(char **refs_str, struct got_reflist_head *refs,
2338     struct got_object_id *id, struct got_repository *repo)
2339 {
2340 	static const struct got_error *err = NULL;
2341 	struct got_reflist_entry *re;
2342 	char *s;
2343 	const char *name;
2344 
2345 	*refs_str = NULL;
2346 
2347 	if (refs == NULL)
2348 		return NULL;
2349 
2350 	TAILQ_FOREACH(re, refs, entry) {
2351 		struct got_tag_object *tag = NULL;
2352 		struct got_object_id *ref_id;
2353 		int cmp;
2354 
2355 		name = got_ref_get_name(re->ref);
2356 		if (strcmp(name, GOT_REF_HEAD) == 0)
2357 			continue;
2358 		if (strncmp(name, "refs/", 5) == 0)
2359 			name += 5;
2360 		if (strncmp(name, "got/", 4) == 0)
2361 			continue;
2362 		if (strncmp(name, "heads/", 6) == 0)
2363 			name += 6;
2364 		if (strncmp(name, "remotes/", 8) == 0) {
2365 			name += 8;
2366 			s = strstr(name, "/" GOT_REF_HEAD);
2367 			if (s != NULL && strcmp(s, "/" GOT_REF_HEAD) == 0)
2368 				continue;
2369 		}
2370 		err = got_ref_resolve(&ref_id, repo, re->ref);
2371 		if (err)
2372 			break;
2373 		if (strncmp(name, "tags/", 5) == 0) {
2374 			err = got_object_open_as_tag(&tag, repo, ref_id);
2375 			if (err) {
2376 				if (err->code != GOT_ERR_OBJ_TYPE) {
2377 					free(ref_id);
2378 					break;
2379 				}
2380 				/* Ref points at something other than a tag. */
2381 				err = NULL;
2382 				tag = NULL;
2383 			}
2384 		}
2385 		cmp = got_object_id_cmp(tag ?
2386 		    got_object_tag_get_object_id(tag) : ref_id, id);
2387 		free(ref_id);
2388 		if (tag)
2389 			got_object_tag_close(tag);
2390 		if (cmp != 0)
2391 			continue;
2392 		s = *refs_str;
2393 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
2394 		    s ? ", " : "", name) == -1) {
2395 			err = got_error_from_errno("asprintf");
2396 			free(s);
2397 			*refs_str = NULL;
2398 			break;
2399 		}
2400 		free(s);
2401 	}
2402 
2403 	return err;
2404 }
2405 
2406 static const struct got_error *
2407 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
2408     int col_tab_align)
2409 {
2410 	char *smallerthan;
2411 
2412 	smallerthan = strchr(author, '<');
2413 	if (smallerthan && smallerthan[1] != '\0')
2414 		author = smallerthan + 1;
2415 	author[strcspn(author, "@>")] = '\0';
2416 	return format_line(wauthor, author_width, NULL, author, 0, limit,
2417 	    col_tab_align, 0);
2418 }
2419 
2420 static const struct got_error *
2421 draw_commit(struct tog_view *view, struct commit_queue_entry *entry,
2422     const size_t date_display_cols, int author_display_cols)
2423 {
2424 	struct tog_log_view_state *s = &view->state.log;
2425 	const struct got_error *err = NULL;
2426 	struct got_commit_object *commit = entry->commit;
2427 	struct got_object_id *id = entry->id;
2428 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
2429 	char *refs_str = NULL;
2430 	char *logmsg0 = NULL, *logmsg = NULL;
2431 	char *author = NULL;
2432 	wchar_t *wrefstr = NULL, *wlogmsg = NULL, *wauthor = NULL;
2433 	int author_width, refstr_width, logmsg_width;
2434 	char *newline, *line = NULL;
2435 	int col, limit, scrollx, logmsg_x;
2436 	const int avail = view->ncols, marker_column = author_display_cols + 1;
2437 	struct tm tm;
2438 	time_t committer_time;
2439 	struct tog_color *tc;
2440 	struct got_reflist_head *refs;
2441 
2442 	if (tog_base_commit.id != NULL && tog_base_commit.idx == -1 &&
2443 	    got_object_id_cmp(id, tog_base_commit.id) == 0)
2444 		tog_base_commit.idx = entry->idx;
2445 	if (tog_io.wait_for_ui && s->thread_args.need_commit_marker) {
2446 		int rc;
2447 
2448 		rc = pthread_cond_wait(&s->thread_args.log_loaded, &tog_mutex);
2449 		if (rc)
2450 			return got_error_set_errno(rc, "pthread_cond_wait");
2451 	}
2452 
2453 	committer_time = got_object_commit_get_committer_time(commit);
2454 	if (gmtime_r(&committer_time, &tm) == NULL)
2455 		return got_error_from_errno("gmtime_r");
2456 	if (strftime(datebuf, sizeof(datebuf), "%F ", &tm) == 0)
2457 		return got_error(GOT_ERR_NO_SPACE);
2458 
2459 	if (avail <= date_display_cols)
2460 		limit = MIN(sizeof(datebuf) - 1, avail);
2461 	else
2462 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
2463 	tc = get_color(&s->colors, TOG_COLOR_DATE);
2464 	if (tc)
2465 		wattr_on(view->window,
2466 		    COLOR_PAIR(tc->colorpair), NULL);
2467 	waddnstr(view->window, datebuf, limit);
2468 	if (tc)
2469 		wattr_off(view->window,
2470 		    COLOR_PAIR(tc->colorpair), NULL);
2471 	col = limit;
2472 	if (col > avail)
2473 		goto done;
2474 
2475 	if (avail >= 120) {
2476 		char *id_str;
2477 		err = got_object_id_str(&id_str, id);
2478 		if (err)
2479 			goto done;
2480 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2481 		if (tc)
2482 			wattr_on(view->window,
2483 			    COLOR_PAIR(tc->colorpair), NULL);
2484 		wprintw(view->window, "%.8s ", id_str);
2485 		if (tc)
2486 			wattr_off(view->window,
2487 			    COLOR_PAIR(tc->colorpair), NULL);
2488 		free(id_str);
2489 		col += 9;
2490 		if (col > avail)
2491 			goto done;
2492 	}
2493 
2494 	if (s->use_committer)
2495 		author = strdup(got_object_commit_get_committer(commit));
2496 	else
2497 		author = strdup(got_object_commit_get_author(commit));
2498 	if (author == NULL) {
2499 		err = got_error_from_errno("strdup");
2500 		goto done;
2501 	}
2502 	err = format_author(&wauthor, &author_width, author, avail - col, col);
2503 	if (err)
2504 		goto done;
2505 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
2506 	if (tc)
2507 		wattr_on(view->window,
2508 		    COLOR_PAIR(tc->colorpair), NULL);
2509 	waddwstr(view->window, wauthor);
2510 	col += author_width;
2511 	while (col < avail && author_width < author_display_cols + 2) {
2512 		if (tog_base_commit.marker != GOT_WORKTREE_STATE_UNKNOWN &&
2513 		    author_width == marker_column &&
2514 		    entry->idx == tog_base_commit.idx && !s->limit_view) {
2515 			tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2516 			if (tc)
2517 				wattr_on(view->window,
2518 				    COLOR_PAIR(tc->colorpair), NULL);
2519 			waddch(view->window, tog_base_commit.marker);
2520 			if (tc)
2521 				wattr_off(view->window,
2522 				    COLOR_PAIR(tc->colorpair), NULL);
2523 		} else
2524 			waddch(view->window, ' ');
2525 		col++;
2526 		author_width++;
2527 	}
2528 	if (tc)
2529 		wattr_off(view->window,
2530 		    COLOR_PAIR(tc->colorpair), NULL);
2531 	if (col > avail)
2532 		goto done;
2533 
2534 	err = got_object_commit_get_logmsg(&logmsg0, commit);
2535 	if (err)
2536 		goto done;
2537 	logmsg = logmsg0;
2538 	while (*logmsg == '\n')
2539 		logmsg++;
2540 	newline = strchr(logmsg, '\n');
2541 	if (newline)
2542 		*newline = '\0';
2543 
2544 	limit = avail - col;
2545 	if (view->child && !view_is_hsplit_top(view) && limit > 0)
2546 		limit--;	/* for the border */
2547 
2548 	/* Prepend reference labels to log message if possible .*/
2549 	refs = got_reflist_object_id_map_lookup(tog_refs_idmap, id);
2550 	err = build_refs_str(&refs_str, refs, id, s->repo);
2551 	if (err)
2552 		goto done;
2553 	if (refs_str) {
2554 		char *rs;
2555 
2556 		if (asprintf(&rs, "[%s]", refs_str) == -1) {
2557 			err = got_error_from_errno("asprintf");
2558 			goto done;
2559 		}
2560 		err = format_line(&wrefstr, &refstr_width,
2561 		    &scrollx, rs, view->x, limit, col, 1);
2562 		free(rs);
2563 		if (err)
2564 			goto done;
2565 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2566 		if (tc)
2567 			wattr_on(view->window,
2568 			    COLOR_PAIR(tc->colorpair), NULL);
2569 		waddwstr(view->window, &wrefstr[scrollx]);
2570 		if (tc)
2571 			wattr_off(view->window,
2572 			    COLOR_PAIR(tc->colorpair), NULL);
2573 		col += MAX(refstr_width, 0);
2574 		if (col > avail)
2575 			goto done;
2576 
2577 		if (col < avail) {
2578 			waddch(view->window, ' ');
2579 			col++;
2580 		}
2581 
2582 		if (refstr_width > 0)
2583 			logmsg_x = 0;
2584 		else {
2585 			int unscrolled_refstr_width;
2586 			size_t len = wcslen(wrefstr);
2587 
2588 			/*
2589 			 * No need to check for -1 return value here since
2590 			 * unprintables have been replaced by span_wline().
2591 			 */
2592 			unscrolled_refstr_width = wcswidth(wrefstr, len);
2593 			unscrolled_refstr_width += 1; /* trailing space */
2594 			logmsg_x = view->x - unscrolled_refstr_width;
2595 		}
2596 
2597 		limit = avail - col;
2598 		if (view->child && !view_is_hsplit_top(view) && limit > 0)
2599 			limit--;	/* for the border */
2600 	} else
2601 		logmsg_x = view->x;
2602 
2603 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, logmsg_x,
2604 	    limit, col, 1);
2605 	if (err)
2606 		goto done;
2607 	waddwstr(view->window, &wlogmsg[scrollx]);
2608 	col += MAX(logmsg_width, 0);
2609 	while (col < avail) {
2610 		waddch(view->window, ' ');
2611 		col++;
2612 	}
2613 done:
2614 	free(logmsg0);
2615 	free(wlogmsg);
2616 	free(wrefstr);
2617 	free(refs_str);
2618 	free(author);
2619 	free(wauthor);
2620 	free(line);
2621 	return err;
2622 }
2623 
2624 static struct commit_queue_entry *
2625 alloc_commit_queue_entry(struct got_commit_object *commit,
2626     struct got_object_id *id)
2627 {
2628 	struct commit_queue_entry *entry;
2629 	struct got_object_id *dup;
2630 
2631 	entry = calloc(1, sizeof(*entry));
2632 	if (entry == NULL)
2633 		return NULL;
2634 
2635 	dup = got_object_id_dup(id);
2636 	if (dup == NULL) {
2637 		free(entry);
2638 		return NULL;
2639 	}
2640 
2641 	entry->id = dup;
2642 	entry->commit = commit;
2643 	return entry;
2644 }
2645 
2646 static void
2647 pop_commit(struct commit_queue *commits)
2648 {
2649 	struct commit_queue_entry *entry;
2650 
2651 	entry = TAILQ_FIRST(&commits->head);
2652 	TAILQ_REMOVE(&commits->head, entry, entry);
2653 	got_object_commit_close(entry->commit);
2654 	commits->ncommits--;
2655 	free(entry->id);
2656 	free(entry);
2657 }
2658 
2659 static void
2660 free_commits(struct commit_queue *commits)
2661 {
2662 	while (!TAILQ_EMPTY(&commits->head))
2663 		pop_commit(commits);
2664 }
2665 
2666 static const struct got_error *
2667 match_commit(int *have_match, struct got_object_id *id,
2668     struct got_commit_object *commit, regex_t *regex)
2669 {
2670 	const struct got_error *err = NULL;
2671 	regmatch_t regmatch;
2672 	char *id_str = NULL, *logmsg = NULL;
2673 
2674 	*have_match = 0;
2675 
2676 	err = got_object_id_str(&id_str, id);
2677 	if (err)
2678 		return err;
2679 
2680 	err = got_object_commit_get_logmsg(&logmsg, commit);
2681 	if (err)
2682 		goto done;
2683 
2684 	if (regexec(regex, got_object_commit_get_author(commit), 1,
2685 	    &regmatch, 0) == 0 ||
2686 	    regexec(regex, got_object_commit_get_committer(commit), 1,
2687 	    &regmatch, 0) == 0 ||
2688 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
2689 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
2690 		*have_match = 1;
2691 done:
2692 	free(id_str);
2693 	free(logmsg);
2694 	return err;
2695 }
2696 
2697 static const struct got_error *
2698 queue_commits(struct tog_log_thread_args *a)
2699 {
2700 	const struct got_error *err = NULL;
2701 
2702 	/*
2703 	 * We keep all commits open throughout the lifetime of the log
2704 	 * view in order to avoid having to re-fetch commits from disk
2705 	 * while updating the display.
2706 	 */
2707 	do {
2708 		struct got_object_id id;
2709 		struct got_commit_object *commit;
2710 		struct commit_queue_entry *entry;
2711 		int limit_match = 0;
2712 		int errcode;
2713 
2714 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
2715 		    NULL, NULL);
2716 		if (err)
2717 			break;
2718 
2719 		err = got_object_open_as_commit(&commit, a->repo, &id);
2720 		if (err)
2721 			break;
2722 		entry = alloc_commit_queue_entry(commit, &id);
2723 		if (entry == NULL) {
2724 			err = got_error_from_errno("alloc_commit_queue_entry");
2725 			break;
2726 		}
2727 
2728 		errcode = pthread_mutex_lock(&tog_mutex);
2729 		if (errcode) {
2730 			err = got_error_set_errno(errcode,
2731 			    "pthread_mutex_lock");
2732 			break;
2733 		}
2734 
2735 		entry->idx = a->real_commits->ncommits;
2736 		TAILQ_INSERT_TAIL(&a->real_commits->head, entry, entry);
2737 		a->real_commits->ncommits++;
2738 
2739 		if (*a->limiting) {
2740 			err = match_commit(&limit_match, &id, commit,
2741 			    a->limit_regex);
2742 			if (err)
2743 				break;
2744 
2745 			if (limit_match) {
2746 				struct commit_queue_entry *matched;
2747 
2748 				matched = alloc_commit_queue_entry(
2749 				    entry->commit, entry->id);
2750 				if (matched == NULL) {
2751 					err = got_error_from_errno(
2752 					    "alloc_commit_queue_entry");
2753 					break;
2754 				}
2755 				matched->commit = entry->commit;
2756 				got_object_commit_retain(entry->commit);
2757 
2758 				matched->idx = a->limit_commits->ncommits;
2759 				TAILQ_INSERT_TAIL(&a->limit_commits->head,
2760 				    matched, entry);
2761 				a->limit_commits->ncommits++;
2762 			}
2763 
2764 			/*
2765 			 * This is how we signal log_thread() that we
2766 			 * have found a match, and that it should be
2767 			 * counted as a new entry for the view.
2768 			 */
2769 			a->limit_match = limit_match;
2770 		}
2771 
2772 		if (*a->searching == TOG_SEARCH_FORWARD &&
2773 		    !*a->search_next_done) {
2774 			int have_match;
2775 			err = match_commit(&have_match, &id, commit, a->regex);
2776 			if (err)
2777 				break;
2778 
2779 			if (*a->limiting) {
2780 				if (limit_match && have_match)
2781 					*a->search_next_done =
2782 					    TOG_SEARCH_HAVE_MORE;
2783 			} else if (have_match)
2784 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
2785 		}
2786 
2787 		errcode = pthread_mutex_unlock(&tog_mutex);
2788 		if (errcode && err == NULL)
2789 			err = got_error_set_errno(errcode,
2790 			    "pthread_mutex_unlock");
2791 		if (err)
2792 			break;
2793 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
2794 
2795 	return err;
2796 }
2797 
2798 static void
2799 select_commit(struct tog_log_view_state *s)
2800 {
2801 	struct commit_queue_entry *entry;
2802 	int ncommits = 0;
2803 
2804 	entry = s->first_displayed_entry;
2805 	while (entry) {
2806 		if (ncommits == s->selected) {
2807 			s->selected_entry = entry;
2808 			break;
2809 		}
2810 		entry = TAILQ_NEXT(entry, entry);
2811 		ncommits++;
2812 	}
2813 }
2814 
2815 static const struct got_error *
2816 draw_commits(struct tog_view *view)
2817 {
2818 	const struct got_error *err = NULL;
2819 	struct tog_log_view_state *s = &view->state.log;
2820 	struct commit_queue_entry *entry = s->selected_entry;
2821 	int limit = view->nlines;
2822 	int width;
2823 	int ncommits, author_cols = 4, refstr_cols;
2824 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
2825 	char *refs_str = NULL;
2826 	wchar_t *wline;
2827 	struct tog_color *tc;
2828 	static const size_t date_display_cols = 12;
2829 	struct got_reflist_head *refs;
2830 
2831 	if (view_is_hsplit_top(view))
2832 		--limit;  /* account for border */
2833 
2834 	if (s->selected_entry &&
2835 	    !(view->searching && view->search_next_done == 0)) {
2836 		err = got_object_id_str(&id_str, s->selected_entry->id);
2837 		if (err)
2838 			return err;
2839 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
2840 		    s->selected_entry->id);
2841 		err = build_refs_str(&refs_str, refs, s->selected_entry->id,
2842 		    s->repo);
2843 		if (err)
2844 			goto done;
2845 	}
2846 
2847 	if (s->thread_args.commits_needed == 0 && !using_mock_io)
2848 		halfdelay(10); /* disable fast refresh */
2849 
2850 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
2851 		if (asprintf(&ncommits_str, " [%d/%d] %s",
2852 		    entry ? entry->idx + 1 : 0, s->commits->ncommits,
2853 		    (view->searching && !view->search_next_done) ?
2854 		    "searching..." : "loading...") == -1) {
2855 			err = got_error_from_errno("asprintf");
2856 			goto done;
2857 		}
2858 	} else {
2859 		const char *search_str = NULL;
2860 		const char *limit_str = NULL;
2861 
2862 		if (view->searching) {
2863 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
2864 				search_str = "no more matches";
2865 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
2866 				search_str = "no matches found";
2867 			else if (!view->search_next_done)
2868 				search_str = "searching...";
2869 		}
2870 
2871 		if (s->limit_view && s->commits->ncommits == 0)
2872 			limit_str = "no matches found";
2873 
2874 		if (asprintf(&ncommits_str, " [%d/%d] %s %s",
2875 		    entry ? entry->idx + 1 : 0, s->commits->ncommits,
2876 		    search_str ? search_str : (refs_str ? refs_str : ""),
2877 		    limit_str ? limit_str : "") == -1) {
2878 			err = got_error_from_errno("asprintf");
2879 			goto done;
2880 		}
2881 	}
2882 
2883 	free(refs_str);
2884 	refs_str = NULL;
2885 
2886 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
2887 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
2888 		    "........................................",
2889 		    s->in_repo_path, ncommits_str) == -1) {
2890 			err = got_error_from_errno("asprintf");
2891 			header = NULL;
2892 			goto done;
2893 		}
2894 	} else if (asprintf(&header, "commit %s%s",
2895 	    id_str ? id_str : "........................................",
2896 	    ncommits_str) == -1) {
2897 		err = got_error_from_errno("asprintf");
2898 		header = NULL;
2899 		goto done;
2900 	}
2901 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
2902 	if (err)
2903 		goto done;
2904 
2905 	werase(view->window);
2906 
2907 	if (view_needs_focus_indication(view))
2908 		wstandout(view->window);
2909 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2910 	if (tc)
2911 		wattr_on(view->window, COLOR_PAIR(tc->colorpair), NULL);
2912 	waddwstr(view->window, wline);
2913 	while (width < view->ncols) {
2914 		waddch(view->window, ' ');
2915 		width++;
2916 	}
2917 	if (tc)
2918 		wattr_off(view->window, COLOR_PAIR(tc->colorpair), NULL);
2919 	if (view_needs_focus_indication(view))
2920 		wstandend(view->window);
2921 	free(wline);
2922 	if (limit <= 1)
2923 		goto done;
2924 
2925 	/* Grow author column size if necessary, and set view->maxx. */
2926 	entry = s->first_displayed_entry;
2927 	ncommits = 0;
2928 	view->maxx = 0;
2929 	while (entry) {
2930 		struct got_commit_object *c = entry->commit;
2931 		char *author, *eol, *msg, *msg0;
2932 		wchar_t *wauthor, *wmsg;
2933 		int width;
2934 		if (ncommits >= limit - 1)
2935 			break;
2936 		if (s->use_committer)
2937 			author = strdup(got_object_commit_get_committer(c));
2938 		else
2939 			author = strdup(got_object_commit_get_author(c));
2940 		if (author == NULL) {
2941 			err = got_error_from_errno("strdup");
2942 			goto done;
2943 		}
2944 		err = format_author(&wauthor, &width, author, COLS,
2945 		    date_display_cols);
2946 		if (author_cols < width)
2947 			author_cols = width;
2948 		free(wauthor);
2949 		free(author);
2950 		if (err)
2951 			goto done;
2952 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
2953 		    entry->id);
2954 		err = build_refs_str(&refs_str, refs, entry->id, s->repo);
2955 		if (err)
2956 			goto done;
2957 		if (refs_str) {
2958 			wchar_t *ws;
2959 			err = format_line(&ws, &width, NULL, refs_str,
2960 			    0, INT_MAX, date_display_cols + author_cols, 0);
2961 			free(ws);
2962 			free(refs_str);
2963 			refs_str = NULL;
2964 			if (err)
2965 				goto done;
2966 			refstr_cols = width + 3; /* account for [ ] + space */
2967 		} else
2968 			refstr_cols = 0;
2969 		err = got_object_commit_get_logmsg(&msg0, c);
2970 		if (err)
2971 			goto done;
2972 		msg = msg0;
2973 		while (*msg == '\n')
2974 			++msg;
2975 		if ((eol = strchr(msg, '\n')))
2976 			*eol = '\0';
2977 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
2978 		    date_display_cols + author_cols + refstr_cols, 0);
2979 		if (err)
2980 			goto done;
2981 		view->maxx = MAX(view->maxx, width + refstr_cols);
2982 		free(msg0);
2983 		free(wmsg);
2984 		ncommits++;
2985 		entry = TAILQ_NEXT(entry, entry);
2986 	}
2987 
2988 	entry = s->first_displayed_entry;
2989 	s->last_displayed_entry = s->first_displayed_entry;
2990 	ncommits = 0;
2991 	while (entry) {
2992 		if (ncommits >= limit - 1)
2993 			break;
2994 		if (ncommits == s->selected)
2995 			wstandout(view->window);
2996 		err = draw_commit(view, entry, date_display_cols, author_cols);
2997 		if (ncommits == s->selected)
2998 			wstandend(view->window);
2999 		if (err)
3000 			goto done;
3001 		ncommits++;
3002 		s->last_displayed_entry = entry;
3003 		entry = TAILQ_NEXT(entry, entry);
3004 	}
3005 
3006 	view_border(view);
3007 done:
3008 	free(id_str);
3009 	free(refs_str);
3010 	free(ncommits_str);
3011 	free(header);
3012 	return err;
3013 }
3014 
3015 static void
3016 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
3017 {
3018 	struct commit_queue_entry *entry;
3019 	int nscrolled = 0;
3020 
3021 	entry = TAILQ_FIRST(&s->commits->head);
3022 	if (s->first_displayed_entry == entry)
3023 		return;
3024 
3025 	entry = s->first_displayed_entry;
3026 	while (entry && nscrolled < maxscroll) {
3027 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
3028 		if (entry) {
3029 			s->first_displayed_entry = entry;
3030 			nscrolled++;
3031 		}
3032 	}
3033 }
3034 
3035 static const struct got_error *
3036 trigger_log_thread(struct tog_view *view, int wait)
3037 {
3038 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
3039 	int errcode;
3040 
3041 	if (!using_mock_io)
3042 		halfdelay(1); /* fast refresh while loading commits */
3043 
3044 	while (!ta->log_complete && !tog_thread_error &&
3045 	    (ta->commits_needed > 0 || ta->load_all)) {
3046 		/* Wake the log thread. */
3047 		errcode = pthread_cond_signal(&ta->need_commits);
3048 		if (errcode)
3049 			return got_error_set_errno(errcode,
3050 			    "pthread_cond_signal");
3051 
3052 		/*
3053 		 * The mutex will be released while the view loop waits
3054 		 * in wgetch(), at which time the log thread will run.
3055 		 */
3056 		if (!wait)
3057 			break;
3058 
3059 		/* Display progress update in log view. */
3060 		show_log_view(view);
3061 		update_panels();
3062 		doupdate();
3063 
3064 		/* Wait right here while next commit is being loaded. */
3065 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
3066 		if (errcode)
3067 			return got_error_set_errno(errcode,
3068 			    "pthread_cond_wait");
3069 
3070 		/* Display progress update in log view. */
3071 		show_log_view(view);
3072 		update_panels();
3073 		doupdate();
3074 	}
3075 
3076 	return NULL;
3077 }
3078 
3079 static const struct got_error *
3080 request_log_commits(struct tog_view *view)
3081 {
3082 	struct tog_log_view_state	*state = &view->state.log;
3083 	const struct got_error		*err = NULL;
3084 
3085 	if (state->thread_args.log_complete)
3086 		return NULL;
3087 
3088 	state->thread_args.commits_needed += view->nscrolled;
3089 	err = trigger_log_thread(view, 1);
3090 	view->nscrolled = 0;
3091 
3092 	return err;
3093 }
3094 
3095 static const struct got_error *
3096 log_scroll_down(struct tog_view *view, int maxscroll)
3097 {
3098 	struct tog_log_view_state *s = &view->state.log;
3099 	const struct got_error *err = NULL;
3100 	struct commit_queue_entry *pentry;
3101 	int nscrolled = 0, ncommits_needed;
3102 
3103 	if (s->last_displayed_entry == NULL)
3104 		return NULL;
3105 
3106 	ncommits_needed = s->last_displayed_entry->idx + 2 + maxscroll;
3107 	if (s->commits->ncommits < ncommits_needed &&
3108 	    !s->thread_args.log_complete) {
3109 		/*
3110 		 * Ask the log thread for required amount of commits.
3111 		 */
3112 		s->thread_args.commits_needed +=
3113 		    ncommits_needed - s->commits->ncommits;
3114 		err = trigger_log_thread(view, 1);
3115 		if (err)
3116 			return err;
3117 	}
3118 
3119 	do {
3120 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
3121 		if (pentry == NULL && view->mode != TOG_VIEW_SPLIT_HRZN)
3122 			break;
3123 
3124 		s->last_displayed_entry = pentry ?
3125 		    pentry : s->last_displayed_entry;
3126 
3127 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
3128 		if (pentry == NULL)
3129 			break;
3130 		s->first_displayed_entry = pentry;
3131 	} while (++nscrolled < maxscroll);
3132 
3133 	if (view->mode == TOG_VIEW_SPLIT_HRZN && !s->thread_args.log_complete)
3134 		view->nscrolled += nscrolled;
3135 	else
3136 		view->nscrolled = 0;
3137 
3138 	return err;
3139 }
3140 
3141 static const struct got_error *
3142 open_diff_view_for_commit(struct tog_view **new_view, int begin_y, int begin_x,
3143     struct got_commit_object *commit, struct got_object_id *commit_id,
3144     struct tog_view *log_view, struct got_repository *repo)
3145 {
3146 	const struct got_error *err;
3147 	struct got_object_qid *parent_id;
3148 	struct tog_view *diff_view;
3149 
3150 	diff_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_DIFF);
3151 	if (diff_view == NULL)
3152 		return got_error_from_errno("view_open");
3153 
3154 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3155 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
3156 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
3157 	if (err == NULL)
3158 		*new_view = diff_view;
3159 	return err;
3160 }
3161 
3162 static const struct got_error *
3163 tree_view_visit_subtree(struct tog_tree_view_state *s,
3164     struct got_tree_object *subtree)
3165 {
3166 	struct tog_parent_tree *parent;
3167 
3168 	parent = calloc(1, sizeof(*parent));
3169 	if (parent == NULL)
3170 		return got_error_from_errno("calloc");
3171 
3172 	parent->tree = s->tree;
3173 	parent->first_displayed_entry = s->first_displayed_entry;
3174 	parent->selected_entry = s->selected_entry;
3175 	parent->selected = s->selected;
3176 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
3177 	s->tree = subtree;
3178 	s->selected = 0;
3179 	s->first_displayed_entry = NULL;
3180 	return NULL;
3181 }
3182 
3183 static const struct got_error *
3184 tree_view_walk_path(struct tog_tree_view_state *s,
3185     struct got_commit_object *commit, const char *path)
3186 {
3187 	const struct got_error *err = NULL;
3188 	struct got_tree_object *tree = NULL;
3189 	const char *p;
3190 	char *slash, *subpath = NULL;
3191 
3192 	/* Walk the path and open corresponding tree objects. */
3193 	p = path;
3194 	while (*p) {
3195 		struct got_tree_entry *te;
3196 		struct got_object_id *tree_id;
3197 		char *te_name;
3198 
3199 		while (p[0] == '/')
3200 			p++;
3201 
3202 		/* Ensure the correct subtree entry is selected. */
3203 		slash = strchr(p, '/');
3204 		if (slash == NULL)
3205 			te_name = strdup(p);
3206 		else
3207 			te_name = strndup(p, slash - p);
3208 		if (te_name == NULL) {
3209 			err = got_error_from_errno("strndup");
3210 			break;
3211 		}
3212 		te = got_object_tree_find_entry(s->tree, te_name);
3213 		if (te == NULL) {
3214 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
3215 			free(te_name);
3216 			break;
3217 		}
3218 		free(te_name);
3219 		s->first_displayed_entry = s->selected_entry = te;
3220 
3221 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
3222 			break; /* jump to this file's entry */
3223 
3224 		slash = strchr(p, '/');
3225 		if (slash)
3226 			subpath = strndup(path, slash - path);
3227 		else
3228 			subpath = strdup(path);
3229 		if (subpath == NULL) {
3230 			err = got_error_from_errno("strdup");
3231 			break;
3232 		}
3233 
3234 		err = got_object_id_by_path(&tree_id, s->repo, commit,
3235 		    subpath);
3236 		if (err)
3237 			break;
3238 
3239 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
3240 		free(tree_id);
3241 		if (err)
3242 			break;
3243 
3244 		err = tree_view_visit_subtree(s, tree);
3245 		if (err) {
3246 			got_object_tree_close(tree);
3247 			break;
3248 		}
3249 		if (slash == NULL)
3250 			break;
3251 		free(subpath);
3252 		subpath = NULL;
3253 		p = slash;
3254 	}
3255 
3256 	free(subpath);
3257 	return err;
3258 }
3259 
3260 static const struct got_error *
3261 browse_commit_tree(struct tog_view **new_view, int begin_y, int begin_x,
3262     struct commit_queue_entry *entry, const char *path,
3263     const char *head_ref_name, struct got_repository *repo)
3264 {
3265 	const struct got_error *err = NULL;
3266 	struct tog_tree_view_state *s;
3267 	struct tog_view *tree_view;
3268 
3269 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
3270 	if (tree_view == NULL)
3271 		return got_error_from_errno("view_open");
3272 
3273 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
3274 	if (err)
3275 		return err;
3276 	s = &tree_view->state.tree;
3277 
3278 	*new_view = tree_view;
3279 
3280 	if (got_path_is_root_dir(path))
3281 		return NULL;
3282 
3283 	return tree_view_walk_path(s, entry->commit, path);
3284 }
3285 
3286 static const struct got_error *
3287 block_signals_used_by_main_thread(void)
3288 {
3289 	sigset_t sigset;
3290 	int errcode;
3291 
3292 	if (sigemptyset(&sigset) == -1)
3293 		return got_error_from_errno("sigemptyset");
3294 
3295 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
3296 	if (sigaddset(&sigset, SIGWINCH) == -1)
3297 		return got_error_from_errno("sigaddset");
3298 	if (sigaddset(&sigset, SIGCONT) == -1)
3299 		return got_error_from_errno("sigaddset");
3300 	if (sigaddset(&sigset, SIGINT) == -1)
3301 		return got_error_from_errno("sigaddset");
3302 	if (sigaddset(&sigset, SIGTERM) == -1)
3303 		return got_error_from_errno("sigaddset");
3304 
3305 	/* ncurses handles SIGTSTP */
3306 	if (sigaddset(&sigset, SIGTSTP) == -1)
3307 		return got_error_from_errno("sigaddset");
3308 
3309 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
3310 	if (errcode)
3311 		return got_error_set_errno(errcode, "pthread_sigmask");
3312 
3313 	return NULL;
3314 }
3315 
3316 static void *
3317 log_thread(void *arg)
3318 {
3319 	const struct got_error *err = NULL;
3320 	int errcode = 0;
3321 	struct tog_log_thread_args *a = arg;
3322 	int done = 0;
3323 
3324 	/*
3325 	 * Sync startup with main thread such that we begin our
3326 	 * work once view_input() has released the mutex.
3327 	 */
3328 	errcode = pthread_mutex_lock(&tog_mutex);
3329 	if (errcode) {
3330 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
3331 		return (void *)err;
3332 	}
3333 
3334 	err = block_signals_used_by_main_thread();
3335 	if (err) {
3336 		pthread_mutex_unlock(&tog_mutex);
3337 		goto done;
3338 	}
3339 
3340 	while (!done && !err && !tog_fatal_signal_received()) {
3341 		errcode = pthread_mutex_unlock(&tog_mutex);
3342 		if (errcode) {
3343 			err = got_error_set_errno(errcode,
3344 			    "pthread_mutex_unlock");
3345 			goto done;
3346 		}
3347 		err = queue_commits(a);
3348 		if (err) {
3349 			if (err->code != GOT_ERR_ITER_COMPLETED)
3350 				goto done;
3351 			err = NULL;
3352 			done = 1;
3353 			a->commits_needed = 0;
3354 		} else if (a->commits_needed > 0 && !a->load_all) {
3355 			if (*a->limiting) {
3356 				if (a->limit_match)
3357 					a->commits_needed--;
3358 			} else
3359 				a->commits_needed--;
3360 		}
3361 
3362 		errcode = pthread_mutex_lock(&tog_mutex);
3363 		if (errcode) {
3364 			err = got_error_set_errno(errcode,
3365 			    "pthread_mutex_lock");
3366 			goto done;
3367 		} else if (*a->quit)
3368 			done = 1;
3369 		else if (*a->limiting && *a->first_displayed_entry == NULL) {
3370 			*a->first_displayed_entry =
3371 			    TAILQ_FIRST(&a->limit_commits->head);
3372 			*a->selected_entry = *a->first_displayed_entry;
3373 		} else if (*a->first_displayed_entry == NULL) {
3374 			*a->first_displayed_entry =
3375 			    TAILQ_FIRST(&a->real_commits->head);
3376 			*a->selected_entry = *a->first_displayed_entry;
3377 		}
3378 
3379 		errcode = pthread_cond_signal(&a->commit_loaded);
3380 		if (errcode) {
3381 			err = got_error_set_errno(errcode,
3382 			    "pthread_cond_signal");
3383 			pthread_mutex_unlock(&tog_mutex);
3384 			goto done;
3385 		}
3386 
3387 		if (a->commits_needed == 0 &&
3388 		    a->need_commit_marker && a->worktree) {
3389 			errcode = pthread_mutex_unlock(&tog_mutex);
3390 			if (errcode) {
3391 				err = got_error_set_errno(errcode,
3392 				    "pthread_mutex_unlock");
3393 				goto done;
3394 			}
3395 			err = got_worktree_get_state(&tog_base_commit.marker,
3396 			    a->repo, a->worktree, NULL, NULL);
3397 			if (err)
3398 				goto done;
3399 			errcode = pthread_mutex_lock(&tog_mutex);
3400 			if (errcode) {
3401 				err = got_error_set_errno(errcode,
3402 				    "pthread_mutex_lock");
3403 				goto done;
3404 			}
3405 			a->need_commit_marker = 0;
3406 			/*
3407 			 * The main thread did not close this
3408 			 * work tree yet. Close it now.
3409 			 */
3410 			got_worktree_close(a->worktree);
3411 			a->worktree = NULL;
3412 
3413 			if (*a->quit)
3414 				done = 1;
3415 		}
3416 
3417 		if (done)
3418 			a->commits_needed = 0;
3419 		else {
3420 			if (a->commits_needed == 0 && !a->load_all) {
3421 				if (tog_io.wait_for_ui) {
3422 					errcode = pthread_cond_signal(
3423 					    &a->log_loaded);
3424 					if (errcode && err == NULL)
3425 						err = got_error_set_errno(
3426 						    errcode,
3427 						    "pthread_cond_signal");
3428 				}
3429 
3430 				errcode = pthread_cond_wait(&a->need_commits,
3431 				    &tog_mutex);
3432 				if (errcode) {
3433 					err = got_error_set_errno(errcode,
3434 					    "pthread_cond_wait");
3435 					pthread_mutex_unlock(&tog_mutex);
3436 					goto done;
3437 				}
3438 				if (*a->quit)
3439 					done = 1;
3440 			}
3441 		}
3442 	}
3443 	a->log_complete = 1;
3444 	if (tog_io.wait_for_ui) {
3445 		errcode = pthread_cond_signal(&a->log_loaded);
3446 		if (errcode && err == NULL)
3447 			err = got_error_set_errno(errcode,
3448 			    "pthread_cond_signal");
3449 	}
3450 
3451 	errcode = pthread_mutex_unlock(&tog_mutex);
3452 	if (errcode)
3453 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
3454 done:
3455 	if (err) {
3456 		tog_thread_error = 1;
3457 		pthread_cond_signal(&a->commit_loaded);
3458 		if (a->worktree) {
3459 			got_worktree_close(a->worktree);
3460 			a->worktree = NULL;
3461 		}
3462 	}
3463 	return (void *)err;
3464 }
3465 
3466 static const struct got_error *
3467 stop_log_thread(struct tog_log_view_state *s)
3468 {
3469 	const struct got_error *err = NULL, *thread_err = NULL;
3470 	int errcode;
3471 
3472 	if (s->thread) {
3473 		s->quit = 1;
3474 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
3475 		if (errcode)
3476 			return got_error_set_errno(errcode,
3477 			    "pthread_cond_signal");
3478 		errcode = pthread_mutex_unlock(&tog_mutex);
3479 		if (errcode)
3480 			return got_error_set_errno(errcode,
3481 			    "pthread_mutex_unlock");
3482 		errcode = pthread_join(s->thread, (void **)&thread_err);
3483 		if (errcode)
3484 			return got_error_set_errno(errcode, "pthread_join");
3485 		errcode = pthread_mutex_lock(&tog_mutex);
3486 		if (errcode)
3487 			return got_error_set_errno(errcode,
3488 			    "pthread_mutex_lock");
3489 		s->thread = 0; //NULL;
3490 	}
3491 
3492 	if (s->thread_args.repo) {
3493 		err = got_repo_close(s->thread_args.repo);
3494 		s->thread_args.repo = NULL;
3495 	}
3496 
3497 	if (s->thread_args.pack_fds) {
3498 		const struct got_error *pack_err =
3499 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
3500 		if (err == NULL)
3501 			err = pack_err;
3502 		s->thread_args.pack_fds = NULL;
3503 	}
3504 
3505 	if (s->thread_args.graph) {
3506 		got_commit_graph_close(s->thread_args.graph);
3507 		s->thread_args.graph = NULL;
3508 	}
3509 
3510 	return err ? err : thread_err;
3511 }
3512 
3513 static const struct got_error *
3514 close_log_view(struct tog_view *view)
3515 {
3516 	const struct got_error *err = NULL;
3517 	struct tog_log_view_state *s = &view->state.log;
3518 	int errcode;
3519 
3520 	err = stop_log_thread(s);
3521 
3522 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
3523 	if (errcode && err == NULL)
3524 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
3525 
3526 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
3527 	if (errcode && err == NULL)
3528 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
3529 
3530 	free_commits(&s->limit_commits);
3531 	free_commits(&s->real_commits);
3532 	free_colors(&s->colors);
3533 	free(s->in_repo_path);
3534 	s->in_repo_path = NULL;
3535 	free(s->start_id);
3536 	s->start_id = NULL;
3537 	free(s->head_ref_name);
3538 	s->head_ref_name = NULL;
3539 	return err;
3540 }
3541 
3542 /*
3543  * We use two queues to implement the limit feature: first consists of
3544  * commits matching the current limit_regex; second is the real queue
3545  * of all known commits (real_commits). When the user starts limiting,
3546  * we swap queues such that all movement and displaying functionality
3547  * works with very slight change.
3548  */
3549 static const struct got_error *
3550 limit_log_view(struct tog_view *view)
3551 {
3552 	struct tog_log_view_state *s = &view->state.log;
3553 	struct commit_queue_entry *entry;
3554 	struct tog_view	*v = view;
3555 	const struct got_error *err = NULL;
3556 	char pattern[1024];
3557 	int ret;
3558 
3559 	if (view_is_hsplit_top(view))
3560 		v = view->child;
3561 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
3562 		v = view->parent;
3563 
3564 	if (tog_io.input_str != NULL) {
3565 		if (strlcpy(pattern, tog_io.input_str, sizeof(pattern)) >=
3566 		    sizeof(pattern))
3567 			return got_error(GOT_ERR_NO_SPACE);
3568 	} else {
3569 		wmove(v->window, v->nlines - 1, 0);
3570 		wclrtoeol(v->window);
3571 		mvwaddstr(v->window, v->nlines - 1, 0, "&/");
3572 		nodelay(v->window, FALSE);
3573 		nocbreak();
3574 		echo();
3575 		ret = wgetnstr(v->window, pattern, sizeof(pattern));
3576 		cbreak();
3577 		noecho();
3578 		nodelay(v->window, TRUE);
3579 		if (ret == ERR)
3580 			return NULL;
3581 	}
3582 
3583 	if (*pattern == '\0') {
3584 		/*
3585 		 * Safety measure for the situation where the user
3586 		 * resets limit without previously limiting anything.
3587 		 */
3588 		if (!s->limit_view)
3589 			return NULL;
3590 
3591 		/*
3592 		 * User could have pressed Ctrl+L, which refreshed the
3593 		 * commit queues, it means we can't save previously
3594 		 * (before limit took place) displayed entries,
3595 		 * because they would point to already free'ed memory,
3596 		 * so we are forced to always select first entry of
3597 		 * the queue.
3598 		 */
3599 		s->commits = &s->real_commits;
3600 		s->first_displayed_entry = TAILQ_FIRST(&s->real_commits.head);
3601 		s->selected_entry = s->first_displayed_entry;
3602 		s->selected = 0;
3603 		s->limit_view = 0;
3604 
3605 		return NULL;
3606 	}
3607 
3608 	if (regcomp(&s->limit_regex, pattern, REG_EXTENDED | REG_NEWLINE))
3609 		return NULL;
3610 
3611 	s->limit_view = 1;
3612 
3613 	/* Clear the screen while loading limit view */
3614 	s->first_displayed_entry = NULL;
3615 	s->last_displayed_entry = NULL;
3616 	s->selected_entry = NULL;
3617 	s->commits = &s->limit_commits;
3618 
3619 	/* Prepare limit queue for new search */
3620 	free_commits(&s->limit_commits);
3621 	s->limit_commits.ncommits = 0;
3622 
3623 	/* First process commits, which are in queue already */
3624 	TAILQ_FOREACH(entry, &s->real_commits.head, entry) {
3625 		int have_match = 0;
3626 
3627 		err = match_commit(&have_match, entry->id,
3628 		    entry->commit, &s->limit_regex);
3629 		if (err)
3630 			return err;
3631 
3632 		if (have_match) {
3633 			struct commit_queue_entry *matched;
3634 
3635 			matched = alloc_commit_queue_entry(entry->commit,
3636 			    entry->id);
3637 			if (matched == NULL) {
3638 				err = got_error_from_errno(
3639 				    "alloc_commit_queue_entry");
3640 				break;
3641 			}
3642 			matched->commit = entry->commit;
3643 			got_object_commit_retain(entry->commit);
3644 
3645 			matched->idx = s->limit_commits.ncommits;
3646 			TAILQ_INSERT_TAIL(&s->limit_commits.head,
3647 			    matched, entry);
3648 			s->limit_commits.ncommits++;
3649 		}
3650 	}
3651 
3652 	/* Second process all the commits, until we fill the screen */
3653 	if (s->limit_commits.ncommits < view->nlines - 1 &&
3654 	    !s->thread_args.log_complete) {
3655 		s->thread_args.commits_needed +=
3656 		    view->nlines - s->limit_commits.ncommits - 1;
3657 		err = trigger_log_thread(view, 1);
3658 		if (err)
3659 			return err;
3660 	}
3661 
3662 	s->first_displayed_entry = TAILQ_FIRST(&s->commits->head);
3663 	s->selected_entry = TAILQ_FIRST(&s->commits->head);
3664 	s->selected = 0;
3665 
3666 	return NULL;
3667 }
3668 
3669 static const struct got_error *
3670 search_start_log_view(struct tog_view *view)
3671 {
3672 	struct tog_log_view_state *s = &view->state.log;
3673 
3674 	s->matched_entry = NULL;
3675 	s->search_entry = NULL;
3676 	return NULL;
3677 }
3678 
3679 static const struct got_error *
3680 search_next_log_view(struct tog_view *view)
3681 {
3682 	const struct got_error *err = NULL;
3683 	struct tog_log_view_state *s = &view->state.log;
3684 	struct commit_queue_entry *entry;
3685 
3686 	/* Display progress update in log view. */
3687 	show_log_view(view);
3688 	update_panels();
3689 	doupdate();
3690 
3691 	if (s->search_entry) {
3692 		if (!using_mock_io) {
3693 			int errcode, ch;
3694 
3695 			errcode = pthread_mutex_unlock(&tog_mutex);
3696 			if (errcode)
3697 				return got_error_set_errno(errcode,
3698 				    "pthread_mutex_unlock");
3699 			ch = wgetch(view->window);
3700 			errcode = pthread_mutex_lock(&tog_mutex);
3701 			if (errcode)
3702 				return got_error_set_errno(errcode,
3703 				    "pthread_mutex_lock");
3704 			if (ch == CTRL('g') || ch == KEY_BACKSPACE) {
3705 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
3706 				return NULL;
3707 			}
3708 		}
3709 		if (view->searching == TOG_SEARCH_FORWARD)
3710 			entry = TAILQ_NEXT(s->search_entry, entry);
3711 		else
3712 			entry = TAILQ_PREV(s->search_entry,
3713 			    commit_queue_head, entry);
3714 	} else if (s->matched_entry) {
3715 		/*
3716 		 * If the user has moved the cursor after we hit a match,
3717 		 * the position from where we should continue searching
3718 		 * might have changed.
3719 		 */
3720 		if (view->searching == TOG_SEARCH_FORWARD)
3721 			entry = TAILQ_NEXT(s->selected_entry, entry);
3722 		else
3723 			entry = TAILQ_PREV(s->selected_entry, commit_queue_head,
3724 			    entry);
3725 	} else {
3726 		entry = s->selected_entry;
3727 	}
3728 
3729 	while (1) {
3730 		int have_match = 0;
3731 
3732 		if (entry == NULL) {
3733 			if (s->thread_args.log_complete ||
3734 			    view->searching == TOG_SEARCH_BACKWARD) {
3735 				view->search_next_done =
3736 				    (s->matched_entry == NULL ?
3737 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
3738 				s->search_entry = NULL;
3739 				return NULL;
3740 			}
3741 			/*
3742 			 * Poke the log thread for more commits and return,
3743 			 * allowing the main loop to make progress. Search
3744 			 * will resume at s->search_entry once we come back.
3745 			 */
3746 			s->search_entry = s->selected_entry;
3747 			s->thread_args.commits_needed++;
3748 			return trigger_log_thread(view, 0);
3749 		}
3750 
3751 		err = match_commit(&have_match, entry->id, entry->commit,
3752 		    &view->regex);
3753 		if (err)
3754 			break;
3755 		if (have_match) {
3756 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3757 			s->matched_entry = entry;
3758 			break;
3759 		}
3760 
3761 		s->search_entry = entry;
3762 		if (view->searching == TOG_SEARCH_FORWARD)
3763 			entry = TAILQ_NEXT(entry, entry);
3764 		else
3765 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3766 	}
3767 
3768 	if (s->matched_entry) {
3769 		int cur = s->selected_entry->idx;
3770 		while (cur < s->matched_entry->idx) {
3771 			err = input_log_view(NULL, view, KEY_DOWN);
3772 			if (err)
3773 				return err;
3774 			cur++;
3775 		}
3776 		while (cur > s->matched_entry->idx) {
3777 			err = input_log_view(NULL, view, KEY_UP);
3778 			if (err)
3779 				return err;
3780 			cur--;
3781 		}
3782 	}
3783 
3784 	s->search_entry = NULL;
3785 
3786 	return NULL;
3787 }
3788 
3789 static const struct got_error *
3790 open_log_view(struct tog_view *view, struct got_object_id *start_id,
3791     struct got_repository *repo, const char *head_ref_name,
3792     const char *in_repo_path, int log_branches,
3793     struct got_worktree *worktree)
3794 {
3795 	const struct got_error *err = NULL;
3796 	struct tog_log_view_state *s = &view->state.log;
3797 	struct got_repository *thread_repo = NULL;
3798 	struct got_commit_graph *thread_graph = NULL;
3799 	int errcode;
3800 
3801 	if (in_repo_path != s->in_repo_path) {
3802 		free(s->in_repo_path);
3803 		s->in_repo_path = strdup(in_repo_path);
3804 		if (s->in_repo_path == NULL) {
3805 			err = got_error_from_errno("strdup");
3806 			goto done;
3807 		}
3808 	}
3809 
3810 	/* The commit queue only contains commits being displayed. */
3811 	TAILQ_INIT(&s->real_commits.head);
3812 	s->real_commits.ncommits = 0;
3813 	s->commits = &s->real_commits;
3814 
3815 	TAILQ_INIT(&s->limit_commits.head);
3816 	s->limit_view = 0;
3817 	s->limit_commits.ncommits = 0;
3818 
3819 	s->repo = repo;
3820 	if (head_ref_name) {
3821 		s->head_ref_name = strdup(head_ref_name);
3822 		if (s->head_ref_name == NULL) {
3823 			err = got_error_from_errno("strdup");
3824 			goto done;
3825 		}
3826 	}
3827 	s->start_id = got_object_id_dup(start_id);
3828 	if (s->start_id == NULL) {
3829 		err = got_error_from_errno("got_object_id_dup");
3830 		goto done;
3831 	}
3832 	s->log_branches = log_branches;
3833 	s->use_committer = 1;
3834 
3835 	STAILQ_INIT(&s->colors);
3836 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3837 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
3838 		    get_color_value("TOG_COLOR_COMMIT"));
3839 		if (err)
3840 			goto done;
3841 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
3842 		    get_color_value("TOG_COLOR_AUTHOR"));
3843 		if (err)
3844 			goto done;
3845 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
3846 		    get_color_value("TOG_COLOR_DATE"));
3847 		if (err)
3848 			goto done;
3849 	}
3850 
3851 	view->show = show_log_view;
3852 	view->input = input_log_view;
3853 	view->resize = resize_log_view;
3854 	view->close = close_log_view;
3855 	view->search_start = search_start_log_view;
3856 	view->search_next = search_next_log_view;
3857 
3858 	if (s->thread_args.pack_fds == NULL) {
3859 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3860 		if (err)
3861 			goto done;
3862 	}
3863 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
3864 	    s->thread_args.pack_fds);
3865 	if (err)
3866 		goto done;
3867 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
3868 	    !s->log_branches);
3869 	if (err)
3870 		goto done;
3871 	err = got_commit_graph_bfsort(thread_graph, s->start_id,
3872 	    s->repo, NULL, NULL);
3873 	if (err)
3874 		goto done;
3875 
3876 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
3877 	if (errcode) {
3878 		err = got_error_set_errno(errcode, "pthread_cond_init");
3879 		goto done;
3880 	}
3881 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
3882 	if (errcode) {
3883 		err = got_error_set_errno(errcode, "pthread_cond_init");
3884 		goto done;
3885 	}
3886 
3887 	if (using_mock_io) {
3888 		int rc;
3889 
3890 		rc = pthread_cond_init(&s->thread_args.log_loaded, NULL);
3891 		if (rc)
3892 			return got_error_set_errno(rc, "pthread_cond_init");
3893 	}
3894 
3895 	s->thread_args.commits_needed = view->nlines;
3896 	s->thread_args.graph = thread_graph;
3897 	s->thread_args.real_commits = &s->real_commits;
3898 	s->thread_args.limit_commits = &s->limit_commits;
3899 	s->thread_args.in_repo_path = s->in_repo_path;
3900 	s->thread_args.start_id = s->start_id;
3901 	s->thread_args.repo = thread_repo;
3902 	s->thread_args.log_complete = 0;
3903 	s->thread_args.quit = &s->quit;
3904 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
3905 	s->thread_args.selected_entry = &s->selected_entry;
3906 	s->thread_args.searching = &view->searching;
3907 	s->thread_args.search_next_done = &view->search_next_done;
3908 	s->thread_args.regex = &view->regex;
3909 	s->thread_args.limiting = &s->limit_view;
3910 	s->thread_args.limit_regex = &s->limit_regex;
3911 	s->thread_args.limit_commits = &s->limit_commits;
3912 	s->thread_args.worktree = worktree;
3913 	if (worktree)
3914 		s->thread_args.need_commit_marker = 1;
3915 done:
3916 	if (err) {
3917 		if (view->close == NULL)
3918 			close_log_view(view);
3919 		view_close(view);
3920 	}
3921 	return err;
3922 }
3923 
3924 static const struct got_error *
3925 show_log_view(struct tog_view *view)
3926 {
3927 	const struct got_error *err;
3928 	struct tog_log_view_state *s = &view->state.log;
3929 
3930 	if (s->thread == 0) { //NULL) {
3931 		int errcode = pthread_create(&s->thread, NULL, log_thread,
3932 		    &s->thread_args);
3933 		if (errcode)
3934 			return got_error_set_errno(errcode, "pthread_create");
3935 		if (s->thread_args.commits_needed > 0) {
3936 			err = trigger_log_thread(view, 1);
3937 			if (err)
3938 				return err;
3939 		}
3940 	}
3941 
3942 	return draw_commits(view);
3943 }
3944 
3945 static void
3946 log_move_cursor_up(struct tog_view *view, int page, int home)
3947 {
3948 	struct tog_log_view_state *s = &view->state.log;
3949 
3950 	if (s->first_displayed_entry == NULL)
3951 		return;
3952 	if (s->selected_entry->idx == 0)
3953 		view->count = 0;
3954 
3955 	if ((page && TAILQ_FIRST(&s->commits->head) == s->first_displayed_entry)
3956 	    || home)
3957 		s->selected = home ? 0 : MAX(0, s->selected - page - 1);
3958 
3959 	if (!page && !home && s->selected > 0)
3960 		--s->selected;
3961 	else
3962 		log_scroll_up(s, home ? s->commits->ncommits : MAX(page, 1));
3963 
3964 	select_commit(s);
3965 	return;
3966 }
3967 
3968 static const struct got_error *
3969 log_move_cursor_down(struct tog_view *view, int page)
3970 {
3971 	struct tog_log_view_state	*s = &view->state.log;
3972 	const struct got_error		*err = NULL;
3973 	int				 eos = view->nlines - 2;
3974 
3975 	if (s->first_displayed_entry == NULL)
3976 		return NULL;
3977 
3978 	if (s->thread_args.log_complete &&
3979 	    s->selected_entry->idx >= s->commits->ncommits - 1)
3980 		return NULL;
3981 
3982 	if (view_is_hsplit_top(view))
3983 		--eos;  /* border consumes the last line */
3984 
3985 	if (!page) {
3986 		if (s->selected < MIN(eos, s->commits->ncommits - 1))
3987 			++s->selected;
3988 		else
3989 			err = log_scroll_down(view, 1);
3990 	} else if (s->thread_args.load_all && s->thread_args.log_complete) {
3991 		struct commit_queue_entry *entry;
3992 		int n;
3993 
3994 		s->selected = 0;
3995 		entry = TAILQ_LAST(&s->commits->head, commit_queue_head);
3996 		s->last_displayed_entry = entry;
3997 		for (n = 0; n <= eos; n++) {
3998 			if (entry == NULL)
3999 				break;
4000 			s->first_displayed_entry = entry;
4001 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
4002 		}
4003 		if (n > 0)
4004 			s->selected = n - 1;
4005 	} else {
4006 		if (s->last_displayed_entry->idx == s->commits->ncommits - 1 &&
4007 		    s->thread_args.log_complete)
4008 			s->selected += MIN(page,
4009 			    s->commits->ncommits - s->selected_entry->idx - 1);
4010 		else
4011 			err = log_scroll_down(view, page);
4012 	}
4013 	if (err)
4014 		return err;
4015 
4016 	/*
4017 	 * We might necessarily overshoot in horizontal
4018 	 * splits; if so, select the last displayed commit.
4019 	 */
4020 	if (view_is_hsplit_top(view) && s->first_displayed_entry &&
4021 	    s->last_displayed_entry) {
4022 		s->selected = MIN(s->selected,
4023 		    s->last_displayed_entry->idx -
4024 		    s->first_displayed_entry->idx);
4025 	}
4026 
4027 	select_commit(s);
4028 
4029 	if (s->thread_args.log_complete &&
4030 	    s->selected_entry->idx == s->commits->ncommits - 1)
4031 		view->count = 0;
4032 
4033 	return NULL;
4034 }
4035 
4036 static void
4037 view_get_split(struct tog_view *view, int *y, int *x)
4038 {
4039 	*x = 0;
4040 	*y = 0;
4041 
4042 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
4043 		if (view->child && view->child->resized_y)
4044 			*y = view->child->resized_y;
4045 		else if (view->resized_y)
4046 			*y = view->resized_y;
4047 		else
4048 			*y = view_split_begin_y(view->lines);
4049 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
4050 		if (view->child && view->child->resized_x)
4051 			*x = view->child->resized_x;
4052 		else if (view->resized_x)
4053 			*x = view->resized_x;
4054 		else
4055 			*x = view_split_begin_x(view->begin_x);
4056 	}
4057 }
4058 
4059 /* Split view horizontally at y and offset view->state->selected line. */
4060 static const struct got_error *
4061 view_init_hsplit(struct tog_view *view, int y)
4062 {
4063 	const struct got_error *err = NULL;
4064 
4065 	view->nlines = y;
4066 	view->ncols = COLS;
4067 	err = view_resize(view);
4068 	if (err)
4069 		return err;
4070 
4071 	err = offset_selection_down(view);
4072 
4073 	return err;
4074 }
4075 
4076 static const struct got_error *
4077 log_goto_line(struct tog_view *view, int nlines)
4078 {
4079 	const struct got_error		*err = NULL;
4080 	struct tog_log_view_state	*s = &view->state.log;
4081 	int				 g, idx = s->selected_entry->idx;
4082 
4083 	if (s->first_displayed_entry == NULL || s->last_displayed_entry == NULL)
4084 		return NULL;
4085 
4086 	g = view->gline;
4087 	view->gline = 0;
4088 
4089 	if (g >= s->first_displayed_entry->idx + 1 &&
4090 	    g <= s->last_displayed_entry->idx + 1 &&
4091 	    g - s->first_displayed_entry->idx - 1 < nlines) {
4092 		s->selected = g - s->first_displayed_entry->idx - 1;
4093 		select_commit(s);
4094 		return NULL;
4095 	}
4096 
4097 	if (idx + 1 < g) {
4098 		err = log_move_cursor_down(view, g - idx - 1);
4099 		if (!err && g > s->selected_entry->idx + 1)
4100 			err = log_move_cursor_down(view,
4101 			    g - s->first_displayed_entry->idx - 1);
4102 		if (err)
4103 			return err;
4104 	} else if (idx + 1 > g)
4105 		log_move_cursor_up(view, idx - g + 1, 0);
4106 
4107 	if (g < nlines && s->first_displayed_entry->idx == 0)
4108 		s->selected = g - 1;
4109 
4110 	select_commit(s);
4111 	return NULL;
4112 
4113 }
4114 
4115 static void
4116 horizontal_scroll_input(struct tog_view *view, int ch)
4117 {
4118 
4119 	switch (ch) {
4120 	case KEY_LEFT:
4121 	case 'h':
4122 		view->x -= MIN(view->x, 2);
4123 		if (view->x <= 0)
4124 			view->count = 0;
4125 		break;
4126 	case KEY_RIGHT:
4127 	case 'l':
4128 		if (view->x + view->ncols / 2 < view->maxx)
4129 			view->x += 2;
4130 		else
4131 			view->count = 0;
4132 		break;
4133 	case '0':
4134 		view->x = 0;
4135 		break;
4136 	case '$':
4137 		view->x = MAX(view->maxx - view->ncols / 2, 0);
4138 		view->count = 0;
4139 		break;
4140 	default:
4141 		break;
4142 	}
4143 }
4144 
4145 static const struct got_error *
4146 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
4147 {
4148 	const struct got_error *err = NULL;
4149 	struct tog_log_view_state *s = &view->state.log;
4150 	int eos, nscroll;
4151 
4152 	if (s->thread_args.load_all) {
4153 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
4154 			s->thread_args.load_all = 0;
4155 		else if (s->thread_args.log_complete) {
4156 			err = log_move_cursor_down(view, s->commits->ncommits);
4157 			s->thread_args.load_all = 0;
4158 		}
4159 		if (err)
4160 			return err;
4161 	}
4162 
4163 	eos = nscroll = view->nlines - 1;
4164 	if (view_is_hsplit_top(view))
4165 		--eos;  /* border */
4166 
4167 	if (view->gline)
4168 		return log_goto_line(view, eos);
4169 
4170 	switch (ch) {
4171 	case '&':
4172 		err = limit_log_view(view);
4173 		break;
4174 	case 'q':
4175 		s->quit = 1;
4176 		break;
4177 	case '0':
4178 	case '$':
4179 	case KEY_RIGHT:
4180 	case 'l':
4181 	case KEY_LEFT:
4182 	case 'h':
4183 		horizontal_scroll_input(view, ch);
4184 		break;
4185 	case 'k':
4186 	case KEY_UP:
4187 	case '<':
4188 	case ',':
4189 	case CTRL('p'):
4190 		log_move_cursor_up(view, 0, 0);
4191 		break;
4192 	case 'g':
4193 	case '=':
4194 	case KEY_HOME:
4195 		log_move_cursor_up(view, 0, 1);
4196 		view->count = 0;
4197 		break;
4198 	case CTRL('u'):
4199 	case 'u':
4200 		nscroll /= 2;
4201 		/* FALL THROUGH */
4202 	case KEY_PPAGE:
4203 	case CTRL('b'):
4204 	case 'b':
4205 		log_move_cursor_up(view, nscroll, 0);
4206 		break;
4207 	case 'j':
4208 	case KEY_DOWN:
4209 	case '>':
4210 	case '.':
4211 	case CTRL('n'):
4212 		err = log_move_cursor_down(view, 0);
4213 		break;
4214 	case '@':
4215 		s->use_committer = !s->use_committer;
4216 		view->action = s->use_committer ?
4217 		    "show committer" : "show commit author";
4218 		break;
4219 	case 'G':
4220 	case '*':
4221 	case KEY_END: {
4222 		/* We don't know yet how many commits, so we're forced to
4223 		 * traverse them all. */
4224 		view->count = 0;
4225 		s->thread_args.load_all = 1;
4226 		if (!s->thread_args.log_complete)
4227 			return trigger_log_thread(view, 0);
4228 		err = log_move_cursor_down(view, s->commits->ncommits);
4229 		s->thread_args.load_all = 0;
4230 		break;
4231 	}
4232 	case CTRL('d'):
4233 	case 'd':
4234 		nscroll /= 2;
4235 		/* FALL THROUGH */
4236 	case KEY_NPAGE:
4237 	case CTRL('f'):
4238 	case 'f':
4239 	case ' ':
4240 		err = log_move_cursor_down(view, nscroll);
4241 		break;
4242 	case KEY_RESIZE:
4243 		if (s->selected > view->nlines - 2)
4244 			s->selected = view->nlines - 2;
4245 		if (s->selected > s->commits->ncommits - 1)
4246 			s->selected = s->commits->ncommits - 1;
4247 		select_commit(s);
4248 		if (s->commits->ncommits < view->nlines - 1 &&
4249 		    !s->thread_args.log_complete) {
4250 			s->thread_args.commits_needed += (view->nlines - 1) -
4251 			    s->commits->ncommits;
4252 			err = trigger_log_thread(view, 1);
4253 		}
4254 		break;
4255 	case KEY_ENTER:
4256 	case '\r':
4257 		view->count = 0;
4258 		if (s->selected_entry == NULL)
4259 			break;
4260 		err = view_request_new(new_view, view, TOG_VIEW_DIFF);
4261 		break;
4262 	case 'T':
4263 		view->count = 0;
4264 		if (s->selected_entry == NULL)
4265 			break;
4266 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
4267 		break;
4268 	case KEY_BACKSPACE:
4269 	case CTRL('l'):
4270 	case 'B':
4271 		view->count = 0;
4272 		if (ch == KEY_BACKSPACE &&
4273 		    got_path_is_root_dir(s->in_repo_path))
4274 			break;
4275 		err = stop_log_thread(s);
4276 		if (err)
4277 			return err;
4278 		if (ch == KEY_BACKSPACE) {
4279 			char *parent_path;
4280 			err = got_path_dirname(&parent_path, s->in_repo_path);
4281 			if (err)
4282 				return err;
4283 			free(s->in_repo_path);
4284 			s->in_repo_path = parent_path;
4285 			s->thread_args.in_repo_path = s->in_repo_path;
4286 		} else if (ch == CTRL('l')) {
4287 			struct got_object_id *start_id;
4288 			err = got_repo_match_object_id(&start_id, NULL,
4289 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
4290 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
4291 			if (err) {
4292 				if (s->head_ref_name == NULL ||
4293 				    err->code != GOT_ERR_NOT_REF)
4294 					return err;
4295 				/* Try to cope with deleted references. */
4296 				free(s->head_ref_name);
4297 				s->head_ref_name = NULL;
4298 				err = got_repo_match_object_id(&start_id,
4299 				    NULL, GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT,
4300 				    &tog_refs, s->repo);
4301 				if (err)
4302 					return err;
4303 			}
4304 			free(s->start_id);
4305 			s->start_id = start_id;
4306 			s->thread_args.start_id = s->start_id;
4307 		} else /* 'B' */
4308 			s->log_branches = !s->log_branches;
4309 
4310 		if (s->thread_args.pack_fds == NULL) {
4311 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
4312 			if (err)
4313 				return err;
4314 		}
4315 		err = got_repo_open(&s->thread_args.repo,
4316 		    got_repo_get_path(s->repo), NULL,
4317 		    s->thread_args.pack_fds);
4318 		if (err)
4319 			return err;
4320 		tog_free_refs();
4321 		err = tog_load_refs(s->repo, 0);
4322 		if (err)
4323 			return err;
4324 		err = got_commit_graph_open(&s->thread_args.graph,
4325 		    s->in_repo_path, !s->log_branches);
4326 		if (err)
4327 			return err;
4328 		err = got_commit_graph_bfsort(s->thread_args.graph,
4329 		    s->start_id, s->repo, NULL, NULL);
4330 		if (err)
4331 			return err;
4332 		free_commits(&s->real_commits);
4333 		free_commits(&s->limit_commits);
4334 		s->first_displayed_entry = NULL;
4335 		s->last_displayed_entry = NULL;
4336 		s->selected_entry = NULL;
4337 		s->selected = 0;
4338 		s->thread_args.log_complete = 0;
4339 		s->quit = 0;
4340 		s->thread_args.commits_needed = view->lines;
4341 		s->matched_entry = NULL;
4342 		s->search_entry = NULL;
4343 		view->offset = 0;
4344 		break;
4345 	case 'R':
4346 		view->count = 0;
4347 		err = view_request_new(new_view, view, TOG_VIEW_REF);
4348 		break;
4349 	default:
4350 		view->count = 0;
4351 		break;
4352 	}
4353 
4354 	return err;
4355 }
4356 
4357 static const struct got_error *
4358 apply_unveil(const char *repo_path, const char *worktree_path)
4359 {
4360 	const struct got_error *error;
4361 
4362 #ifdef PROFILE
4363 	if (unveil("gmon.out", "rwc") != 0)
4364 		return got_error_from_errno2("unveil", "gmon.out");
4365 #endif
4366 	if (repo_path && unveil(repo_path, "r") != 0)
4367 		return got_error_from_errno2("unveil", repo_path);
4368 
4369 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
4370 		return got_error_from_errno2("unveil", worktree_path);
4371 
4372 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
4373 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
4374 
4375 	error = got_privsep_unveil_exec_helpers();
4376 	if (error != NULL)
4377 		return error;
4378 
4379 	if (unveil(NULL, NULL) != 0)
4380 		return got_error_from_errno("unveil");
4381 
4382 	return NULL;
4383 }
4384 
4385 static const struct got_error *
4386 init_mock_term(const char *test_script_path)
4387 {
4388 	const struct got_error	*err = NULL;
4389 	const char *screen_dump_path;
4390 	int in;
4391 
4392 	if (test_script_path == NULL || *test_script_path == '\0')
4393 		return got_error_msg(GOT_ERR_IO, "TOG_TEST_SCRIPT not defined");
4394 
4395 	tog_io.f = fopen(test_script_path, "re");
4396 	if (tog_io.f == NULL) {
4397 		err = got_error_from_errno_fmt("fopen: %s",
4398 		    test_script_path);
4399 		goto done;
4400 	}
4401 
4402 	/* test mode, we don't want any output */
4403 	tog_io.cout = fopen("/dev/null", "w+");
4404 	if (tog_io.cout == NULL) {
4405 		err = got_error_from_errno2("fopen", "/dev/null");
4406 		goto done;
4407 	}
4408 
4409 	in = dup(fileno(tog_io.cout));
4410 	if (in == -1) {
4411 		err = got_error_from_errno("dup");
4412 		goto done;
4413 	}
4414 	tog_io.cin = fdopen(in, "r");
4415 	if (tog_io.cin == NULL) {
4416 		err = got_error_from_errno("fdopen");
4417 		close(in);
4418 		goto done;
4419 	}
4420 
4421 	screen_dump_path = getenv("TOG_SCR_DUMP");
4422 	if (screen_dump_path == NULL || *screen_dump_path == '\0')
4423 		return got_error_msg(GOT_ERR_IO, "TOG_SCR_DUMP not defined");
4424 	tog_io.sdump = fopen(screen_dump_path, "we");
4425 	if (tog_io.sdump == NULL) {
4426 		err = got_error_from_errno2("fopen", screen_dump_path);
4427 		goto done;
4428 	}
4429 
4430 	if (fseeko(tog_io.f, 0L, SEEK_SET) == -1) {
4431 		err = got_error_from_errno("fseeko");
4432 		goto done;
4433 	}
4434 
4435 	if (newterm(NULL, tog_io.cout, tog_io.cin) == NULL)
4436 		err = got_error_msg(GOT_ERR_IO,
4437 		    "newterm: failed to initialise curses");
4438 
4439 	using_mock_io = 1;
4440 
4441 done:
4442 	if (err)
4443 		tog_io_close();
4444 	return err;
4445 }
4446 
4447 static void
4448 init_curses(void)
4449 {
4450 	if (using_mock_io) /* In test mode we use a fake terminal */
4451 		return;
4452 
4453 	initscr();
4454 
4455 	cbreak();
4456 	halfdelay(1); /* Fast refresh while initial view is loading. */
4457 	noecho();
4458 	nonl();
4459 	intrflush(stdscr, FALSE);
4460 	keypad(stdscr, TRUE);
4461 	curs_set(0);
4462 	if (getenv("TOG_COLORS") != NULL) {
4463 		start_color();
4464 		use_default_colors();
4465 	}
4466 
4467 	return;
4468 }
4469 
4470 static const struct got_error *
4471 set_tog_base_commit(struct got_repository *repo, struct got_worktree *worktree)
4472 {
4473 	tog_base_commit.id = got_object_id_dup(
4474 	    got_worktree_get_base_commit_id(worktree));
4475 	if (tog_base_commit.id == NULL)
4476 		return got_error_from_errno( "got_object_id_dup");
4477 
4478 	return NULL;
4479 }
4480 
4481 static const struct got_error *
4482 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
4483     struct got_repository *repo, struct got_worktree *worktree)
4484 {
4485 	const struct got_error *err = NULL;
4486 
4487 	if (argc == 0) {
4488 		*in_repo_path = strdup("/");
4489 		if (*in_repo_path == NULL)
4490 			return got_error_from_errno("strdup");
4491 		return NULL;
4492 	}
4493 
4494 	if (worktree) {
4495 		const char *prefix = got_worktree_get_path_prefix(worktree);
4496 		char *p;
4497 
4498 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
4499 		if (err)
4500 			return err;
4501 		if (asprintf(in_repo_path, "%s%s%s", prefix,
4502 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
4503 		    p) == -1) {
4504 			err = got_error_from_errno("asprintf");
4505 			*in_repo_path = NULL;
4506 		}
4507 		free(p);
4508 	} else
4509 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
4510 
4511 	return err;
4512 }
4513 
4514 static const struct got_error *
4515 cmd_log(int argc, char *argv[])
4516 {
4517 	const struct got_error *error;
4518 	struct got_repository *repo = NULL;
4519 	struct got_worktree *worktree = NULL;
4520 	struct got_object_id *start_id = NULL;
4521 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
4522 	char *keyword_idstr = NULL, *start_commit = NULL, *label = NULL;
4523 	struct got_reference *ref = NULL;
4524 	const char *head_ref_name = NULL;
4525 	int ch, log_branches = 0;
4526 	struct tog_view *view;
4527 	int *pack_fds = NULL;
4528 
4529 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
4530 		switch (ch) {
4531 		case 'b':
4532 			log_branches = 1;
4533 			break;
4534 		case 'c':
4535 			start_commit = optarg;
4536 			break;
4537 		case 'r':
4538 			repo_path = realpath(optarg, NULL);
4539 			if (repo_path == NULL)
4540 				return got_error_from_errno2("realpath",
4541 				    optarg);
4542 			break;
4543 		default:
4544 			usage_log();
4545 			/* NOTREACHED */
4546 		}
4547 	}
4548 
4549 	argc -= optind;
4550 	argv += optind;
4551 
4552 	if (argc > 1)
4553 		usage_log();
4554 
4555 	error = got_repo_pack_fds_open(&pack_fds);
4556 	if (error != NULL)
4557 		goto done;
4558 
4559 	if (repo_path == NULL) {
4560 		cwd = getcwd(NULL, 0);
4561 		if (cwd == NULL) {
4562 			error = got_error_from_errno("getcwd");
4563 			goto done;
4564 		}
4565 		error = got_worktree_open(&worktree, cwd, NULL);
4566 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4567 			goto done;
4568 		if (worktree)
4569 			repo_path =
4570 			    strdup(got_worktree_get_repo_path(worktree));
4571 		else
4572 			repo_path = strdup(cwd);
4573 		if (repo_path == NULL) {
4574 			error = got_error_from_errno("strdup");
4575 			goto done;
4576 		}
4577 	}
4578 
4579 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4580 	if (error != NULL)
4581 		goto done;
4582 
4583 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
4584 	    repo, worktree);
4585 	if (error)
4586 		goto done;
4587 
4588 	init_curses();
4589 
4590 	error = apply_unveil(got_repo_get_path(repo),
4591 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
4592 	if (error)
4593 		goto done;
4594 
4595 	/* already loaded by tog_log_with_path()? */
4596 	if (TAILQ_EMPTY(&tog_refs)) {
4597 		error = tog_load_refs(repo, 0);
4598 		if (error)
4599 			goto done;
4600 	}
4601 
4602 	if (start_commit == NULL) {
4603 		error = got_repo_match_object_id(&start_id, &label,
4604 		    worktree ? got_worktree_get_head_ref_name(worktree) :
4605 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
4606 		if (error)
4607 			goto done;
4608 		head_ref_name = label;
4609 	} else {
4610 		error = got_keyword_to_idstr(&keyword_idstr, start_commit,
4611 		    repo, worktree);
4612 		if (error != NULL)
4613 			goto done;
4614 		if (keyword_idstr != NULL)
4615 			start_commit = keyword_idstr;
4616 
4617 		error = got_ref_open(&ref, repo, start_commit, 0);
4618 		if (error == NULL)
4619 			head_ref_name = got_ref_get_name(ref);
4620 		else if (error->code != GOT_ERR_NOT_REF)
4621 			goto done;
4622 		error = got_repo_match_object_id(&start_id, NULL,
4623 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
4624 		if (error)
4625 			goto done;
4626 	}
4627 
4628 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
4629 	if (view == NULL) {
4630 		error = got_error_from_errno("view_open");
4631 		goto done;
4632 	}
4633 
4634 	if (worktree) {
4635 		error = set_tog_base_commit(repo, worktree);
4636 		if (error != NULL)
4637 			goto done;
4638 	}
4639 
4640 	error = open_log_view(view, start_id, repo, head_ref_name,
4641 	    in_repo_path, log_branches, worktree);
4642 	if (error)
4643 		goto done;
4644 
4645 	if (worktree) {
4646 		/* The work tree will be closed by the log thread. */
4647 		worktree = NULL;
4648 	}
4649 
4650 	error = view_loop(view);
4651 
4652 done:
4653 	free(tog_base_commit.id);
4654 	free(keyword_idstr);
4655 	free(in_repo_path);
4656 	free(repo_path);
4657 	free(cwd);
4658 	free(start_id);
4659 	free(label);
4660 	if (ref)
4661 		got_ref_close(ref);
4662 	if (repo) {
4663 		const struct got_error *close_err = got_repo_close(repo);
4664 		if (error == NULL)
4665 			error = close_err;
4666 	}
4667 	if (worktree)
4668 		got_worktree_close(worktree);
4669 	if (pack_fds) {
4670 		const struct got_error *pack_err =
4671 		    got_repo_pack_fds_close(pack_fds);
4672 		if (error == NULL)
4673 			error = pack_err;
4674 	}
4675 	tog_free_refs();
4676 	return error;
4677 }
4678 
4679 __dead static void
4680 usage_diff(void)
4681 {
4682 	endwin();
4683 	fprintf(stderr, "usage: %s diff [-aw] [-C number] [-r repository-path] "
4684 	    "object1 object2\n", getprogname());
4685 	exit(1);
4686 }
4687 
4688 static int
4689 match_line(const char *line, regex_t *regex, size_t nmatch,
4690     regmatch_t *regmatch)
4691 {
4692 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
4693 }
4694 
4695 static struct tog_color *
4696 match_color(struct tog_colors *colors, const char *line)
4697 {
4698 	struct tog_color *tc = NULL;
4699 
4700 	STAILQ_FOREACH(tc, colors, entry) {
4701 		if (match_line(line, &tc->regex, 0, NULL))
4702 			return tc;
4703 	}
4704 
4705 	return NULL;
4706 }
4707 
4708 static const struct got_error *
4709 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
4710     WINDOW *window, int skipcol, regmatch_t *regmatch)
4711 {
4712 	const struct got_error *err = NULL;
4713 	char *exstr = NULL;
4714 	wchar_t *wline = NULL;
4715 	int rme, rms, n, width, scrollx;
4716 	int width0 = 0, width1 = 0, width2 = 0;
4717 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
4718 
4719 	*wtotal = 0;
4720 
4721 	rms = regmatch->rm_so;
4722 	rme = regmatch->rm_eo;
4723 
4724 	err = expand_tab(&exstr, line);
4725 	if (err)
4726 		return err;
4727 
4728 	/* Split the line into 3 segments, according to match offsets. */
4729 	seg0 = strndup(exstr, rms);
4730 	if (seg0 == NULL) {
4731 		err = got_error_from_errno("strndup");
4732 		goto done;
4733 	}
4734 	seg1 = strndup(exstr + rms, rme - rms);
4735 	if (seg1 == NULL) {
4736 		err = got_error_from_errno("strndup");
4737 		goto done;
4738 	}
4739 	seg2 = strdup(exstr + rme);
4740 	if (seg2 == NULL) {
4741 		err = got_error_from_errno("strndup");
4742 		goto done;
4743 	}
4744 
4745 	/* draw up to matched token if we haven't scrolled past it */
4746 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
4747 	    col_tab_align, 1);
4748 	if (err)
4749 		goto done;
4750 	n = MAX(width0 - skipcol, 0);
4751 	if (n) {
4752 		free(wline);
4753 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
4754 		    wlimit, col_tab_align, 1);
4755 		if (err)
4756 			goto done;
4757 		waddwstr(window, &wline[scrollx]);
4758 		wlimit -= width;
4759 		*wtotal += width;
4760 	}
4761 
4762 	if (wlimit > 0) {
4763 		int i = 0, w = 0;
4764 		size_t wlen;
4765 
4766 		free(wline);
4767 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
4768 		    col_tab_align, 1);
4769 		if (err)
4770 			goto done;
4771 		wlen = wcslen(wline);
4772 		while (i < wlen) {
4773 			width = wcwidth(wline[i]);
4774 			if (width == -1) {
4775 				/* should not happen, tabs are expanded */
4776 				err = got_error(GOT_ERR_RANGE);
4777 				goto done;
4778 			}
4779 			if (width0 + w + width > skipcol)
4780 				break;
4781 			w += width;
4782 			i++;
4783 		}
4784 		/* draw (visible part of) matched token (if scrolled into it) */
4785 		if (width1 - w > 0) {
4786 			wattron(window, A_STANDOUT);
4787 			waddwstr(window, &wline[i]);
4788 			wattroff(window, A_STANDOUT);
4789 			wlimit -= (width1 - w);
4790 			*wtotal += (width1 - w);
4791 		}
4792 	}
4793 
4794 	if (wlimit > 0) {  /* draw rest of line */
4795 		free(wline);
4796 		if (skipcol > width0 + width1) {
4797 			err = format_line(&wline, &width2, &scrollx, seg2,
4798 			    skipcol - (width0 + width1), wlimit,
4799 			    col_tab_align, 1);
4800 			if (err)
4801 				goto done;
4802 			waddwstr(window, &wline[scrollx]);
4803 		} else {
4804 			err = format_line(&wline, &width2, NULL, seg2, 0,
4805 			    wlimit, col_tab_align, 1);
4806 			if (err)
4807 				goto done;
4808 			waddwstr(window, wline);
4809 		}
4810 		*wtotal += width2;
4811 	}
4812 done:
4813 	free(wline);
4814 	free(exstr);
4815 	free(seg0);
4816 	free(seg1);
4817 	free(seg2);
4818 	return err;
4819 }
4820 
4821 static int
4822 gotoline(struct tog_view *view, int *lineno, int *nprinted)
4823 {
4824 	FILE	*f = NULL;
4825 	int	*eof, *first, *selected;
4826 
4827 	if (view->type == TOG_VIEW_DIFF) {
4828 		struct tog_diff_view_state *s = &view->state.diff;
4829 
4830 		first = &s->first_displayed_line;
4831 		selected = first;
4832 		eof = &s->eof;
4833 		f = s->f;
4834 	} else if (view->type == TOG_VIEW_HELP) {
4835 		struct tog_help_view_state *s = &view->state.help;
4836 
4837 		first = &s->first_displayed_line;
4838 		selected = first;
4839 		eof = &s->eof;
4840 		f = s->f;
4841 	} else if (view->type == TOG_VIEW_BLAME) {
4842 		struct tog_blame_view_state *s = &view->state.blame;
4843 
4844 		first = &s->first_displayed_line;
4845 		selected = &s->selected_line;
4846 		eof = &s->eof;
4847 		f = s->blame.f;
4848 	} else
4849 		return 0;
4850 
4851 	/* Center gline in the middle of the page like vi(1). */
4852 	if (*lineno < view->gline - (view->nlines - 3) / 2)
4853 		return 0;
4854 	if (*first != 1 && (*lineno > view->gline - (view->nlines - 3) / 2)) {
4855 		rewind(f);
4856 		*eof = 0;
4857 		*first = 1;
4858 		*lineno = 0;
4859 		*nprinted = 0;
4860 		return 0;
4861 	}
4862 
4863 	*selected = view->gline <= (view->nlines - 3) / 2 ?
4864 		view->gline : (view->nlines - 3) / 2 + 1;
4865 	view->gline = 0;
4866 
4867 	return 1;
4868 }
4869 
4870 static const struct got_error *
4871 draw_file(struct tog_view *view, const char *header)
4872 {
4873 	struct tog_diff_view_state *s = &view->state.diff;
4874 	regmatch_t *regmatch = &view->regmatch;
4875 	const struct got_error *err;
4876 	int nprinted = 0;
4877 	char *line;
4878 	size_t linesize = 0;
4879 	ssize_t linelen;
4880 	wchar_t *wline;
4881 	int width;
4882 	int max_lines = view->nlines;
4883 	int nlines = s->nlines;
4884 	off_t line_offset;
4885 
4886 	s->lineno = s->first_displayed_line - 1;
4887 	line_offset = s->lines[s->first_displayed_line - 1].offset;
4888 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
4889 		return got_error_from_errno("fseek");
4890 
4891 	werase(view->window);
4892 
4893 	if (view->gline > s->nlines - 1)
4894 		view->gline = s->nlines - 1;
4895 
4896 	if (header) {
4897 		int ln = view->gline ? view->gline <= (view->nlines - 3) / 2 ?
4898 		    1 : view->gline - (view->nlines - 3) / 2 :
4899 		    s->lineno + s->selected_line;
4900 
4901 		if (asprintf(&line, "[%d/%d] %s", ln, nlines, header) == -1)
4902 			return got_error_from_errno("asprintf");
4903 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
4904 		    0, 0);
4905 		free(line);
4906 		if (err)
4907 			return err;
4908 
4909 		if (view_needs_focus_indication(view))
4910 			wstandout(view->window);
4911 		waddwstr(view->window, wline);
4912 		free(wline);
4913 		wline = NULL;
4914 		while (width++ < view->ncols)
4915 			waddch(view->window, ' ');
4916 		if (view_needs_focus_indication(view))
4917 			wstandend(view->window);
4918 
4919 		if (max_lines <= 1)
4920 			return NULL;
4921 		max_lines--;
4922 	}
4923 
4924 	s->eof = 0;
4925 	view->maxx = 0;
4926 	line = NULL;
4927 	while (max_lines > 0 && nprinted < max_lines) {
4928 		enum got_diff_line_type linetype;
4929 		attr_t attr = 0;
4930 
4931 		linelen = getline(&line, &linesize, s->f);
4932 		if (linelen == -1) {
4933 			if (feof(s->f)) {
4934 				s->eof = 1;
4935 				break;
4936 			}
4937 			free(line);
4938 			return got_ferror(s->f, GOT_ERR_IO);
4939 		}
4940 
4941 		if (++s->lineno < s->first_displayed_line)
4942 			continue;
4943 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
4944 			continue;
4945 		if (s->lineno == view->hiline)
4946 			attr = A_STANDOUT;
4947 
4948 		/* Set view->maxx based on full line length. */
4949 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
4950 		    view->x ? 1 : 0);
4951 		if (err) {
4952 			free(line);
4953 			return err;
4954 		}
4955 		view->maxx = MAX(view->maxx, width);
4956 		free(wline);
4957 		wline = NULL;
4958 
4959 		linetype = s->lines[s->lineno].type;
4960 		if (linetype > GOT_DIFF_LINE_LOGMSG &&
4961 		    linetype < GOT_DIFF_LINE_CONTEXT)
4962 			attr |= COLOR_PAIR(linetype);
4963 		if (attr)
4964 			wattron(view->window, attr);
4965 		if (s->first_displayed_line + nprinted == s->matched_line &&
4966 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4967 			err = add_matched_line(&width, line, view->ncols, 0,
4968 			    view->window, view->x, regmatch);
4969 			if (err) {
4970 				free(line);
4971 				return err;
4972 			}
4973 		} else {
4974 			int skip;
4975 			err = format_line(&wline, &width, &skip, line,
4976 			    view->x, view->ncols, 0, view->x ? 1 : 0);
4977 			if (err) {
4978 				free(line);
4979 				return err;
4980 			}
4981 			waddwstr(view->window, &wline[skip]);
4982 			free(wline);
4983 			wline = NULL;
4984 		}
4985 		if (s->lineno == view->hiline) {
4986 			/* highlight full gline length */
4987 			while (width++ < view->ncols)
4988 				waddch(view->window, ' ');
4989 		} else {
4990 			if (width <= view->ncols - 1)
4991 				waddch(view->window, '\n');
4992 		}
4993 		if (attr)
4994 			wattroff(view->window, attr);
4995 		if (++nprinted == 1)
4996 			s->first_displayed_line = s->lineno;
4997 	}
4998 	free(line);
4999 	if (nprinted >= 1)
5000 		s->last_displayed_line = s->first_displayed_line +
5001 		    (nprinted - 1);
5002 	else
5003 		s->last_displayed_line = s->first_displayed_line;
5004 
5005 	view_border(view);
5006 
5007 	if (s->eof) {
5008 		while (nprinted < view->nlines) {
5009 			waddch(view->window, '\n');
5010 			nprinted++;
5011 		}
5012 
5013 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
5014 		    view->ncols, 0, 0);
5015 		if (err) {
5016 			return err;
5017 		}
5018 
5019 		wstandout(view->window);
5020 		waddwstr(view->window, wline);
5021 		free(wline);
5022 		wline = NULL;
5023 		wstandend(view->window);
5024 	}
5025 
5026 	return NULL;
5027 }
5028 
5029 static char *
5030 get_datestr(time_t *time, char *datebuf)
5031 {
5032 	struct tm mytm, *tm;
5033 	char *p, *s;
5034 
5035 	tm = gmtime_r(time, &mytm);
5036 	if (tm == NULL)
5037 		return NULL;
5038 	s = asctime_r(tm, datebuf);
5039 	if (s == NULL)
5040 		return NULL;
5041 	p = strchr(s, '\n');
5042 	if (p)
5043 		*p = '\0';
5044 	return s;
5045 }
5046 
5047 static const struct got_error *
5048 add_line_metadata(struct got_diff_line **lines, size_t *nlines,
5049     off_t off, uint8_t type)
5050 {
5051 	struct got_diff_line *p;
5052 
5053 	p = reallocarray(*lines, *nlines + 1, sizeof(**lines));
5054 	if (p == NULL)
5055 		return got_error_from_errno("reallocarray");
5056 	*lines = p;
5057 	(*lines)[*nlines].offset = off;
5058 	(*lines)[*nlines].type = type;
5059 	(*nlines)++;
5060 
5061 	return NULL;
5062 }
5063 
5064 static const struct got_error *
5065 cat_diff(FILE *dst, FILE *src, struct got_diff_line **d_lines, size_t *d_nlines,
5066     struct got_diff_line *s_lines, size_t s_nlines)
5067 {
5068 	struct got_diff_line	*p;
5069 	char			 buf[BUFSIZ];
5070 	size_t			 i, r;
5071 
5072 	if (fseeko(src, 0L, SEEK_SET) == -1)
5073 		return got_error_from_errno("fseeko");
5074 
5075 	for (;;) {
5076 		r = fread(buf, 1, sizeof(buf), src);
5077 		if (r == 0) {
5078 			if (ferror(src))
5079 				return got_error_from_errno("fread");
5080 			if (feof(src))
5081 				break;
5082 		}
5083 		if (fwrite(buf, 1, r, dst) != r)
5084 			return got_ferror(dst, GOT_ERR_IO);
5085 	}
5086 
5087 	if (s_nlines == 0 && *d_nlines == 0)
5088 		return NULL;
5089 
5090 	/*
5091 	 * If commit info was in dst, increment line offsets
5092 	 * of the appended diff content, but skip s_lines[0]
5093 	 * because offset zero is already in *d_lines.
5094 	 */
5095 	if (*d_nlines > 0) {
5096 		for (i = 1; i < s_nlines; ++i)
5097 			s_lines[i].offset += (*d_lines)[*d_nlines - 1].offset;
5098 
5099 		if (s_nlines > 0) {
5100 			--s_nlines;
5101 			++s_lines;
5102 		}
5103 	}
5104 
5105 	p = reallocarray(*d_lines, *d_nlines + s_nlines, sizeof(*p));
5106 	if (p == NULL) {
5107 		/* d_lines is freed in close_diff_view() */
5108 		return got_error_from_errno("reallocarray");
5109 	}
5110 
5111 	*d_lines = p;
5112 
5113 	memcpy(*d_lines + *d_nlines, s_lines, s_nlines * sizeof(*s_lines));
5114 	*d_nlines += s_nlines;
5115 
5116 	return NULL;
5117 }
5118 
5119 static const struct got_error *
5120 write_commit_info(struct got_diff_line **lines, size_t *nlines,
5121     struct got_object_id *commit_id, struct got_reflist_head *refs,
5122     struct got_repository *repo, int ignore_ws, int force_text_diff,
5123     struct got_diffstat_cb_arg *dsa, FILE *outfile)
5124 {
5125 	const struct got_error *err = NULL;
5126 	char datebuf[26], *datestr;
5127 	struct got_commit_object *commit;
5128 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
5129 	time_t committer_time;
5130 	const char *author, *committer;
5131 	char *refs_str = NULL;
5132 	struct got_pathlist_entry *pe;
5133 	off_t outoff = 0;
5134 	int n;
5135 
5136 	err = build_refs_str(&refs_str, refs, commit_id, repo);
5137 	if (err)
5138 		return err;
5139 
5140 	err = got_object_open_as_commit(&commit, repo, commit_id);
5141 	if (err)
5142 		return err;
5143 
5144 	err = got_object_id_str(&id_str, commit_id);
5145 	if (err) {
5146 		err = got_error_from_errno("got_object_id_str");
5147 		goto done;
5148 	}
5149 
5150 	err = add_line_metadata(lines, nlines, 0, GOT_DIFF_LINE_NONE);
5151 	if (err)
5152 		goto done;
5153 
5154 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
5155 	    refs_str ? refs_str : "", refs_str ? ")" : "");
5156 	if (n < 0) {
5157 		err = got_error_from_errno("fprintf");
5158 		goto done;
5159 	}
5160 	outoff += n;
5161 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_META);
5162 	if (err)
5163 		goto done;
5164 
5165 	n = fprintf(outfile, "from: %s\n",
5166 	    got_object_commit_get_author(commit));
5167 	if (n < 0) {
5168 		err = got_error_from_errno("fprintf");
5169 		goto done;
5170 	}
5171 	outoff += n;
5172 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_AUTHOR);
5173 	if (err)
5174 		goto done;
5175 
5176 	author = got_object_commit_get_author(commit);
5177 	committer = got_object_commit_get_committer(commit);
5178 	if (strcmp(author, committer) != 0) {
5179 		n = fprintf(outfile, "via: %s\n", committer);
5180 		if (n < 0) {
5181 			err = got_error_from_errno("fprintf");
5182 			goto done;
5183 		}
5184 		outoff += n;
5185 		err = add_line_metadata(lines, nlines, outoff,
5186 		    GOT_DIFF_LINE_AUTHOR);
5187 		if (err)
5188 			goto done;
5189 	}
5190 	committer_time = got_object_commit_get_committer_time(commit);
5191 	datestr = get_datestr(&committer_time, datebuf);
5192 	if (datestr) {
5193 		n = fprintf(outfile, "date: %s UTC\n", datestr);
5194 		if (n < 0) {
5195 			err = got_error_from_errno("fprintf");
5196 			goto done;
5197 		}
5198 		outoff += n;
5199 		err = add_line_metadata(lines, nlines, outoff,
5200 		    GOT_DIFF_LINE_DATE);
5201 		if (err)
5202 			goto done;
5203 	}
5204 	if (got_object_commit_get_nparents(commit) > 1) {
5205 		const struct got_object_id_queue *parent_ids;
5206 		struct got_object_qid *qid;
5207 		int pn = 1;
5208 		parent_ids = got_object_commit_get_parent_ids(commit);
5209 		STAILQ_FOREACH(qid, parent_ids, entry) {
5210 			err = got_object_id_str(&id_str, &qid->id);
5211 			if (err)
5212 				goto done;
5213 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
5214 			if (n < 0) {
5215 				err = got_error_from_errno("fprintf");
5216 				goto done;
5217 			}
5218 			outoff += n;
5219 			err = add_line_metadata(lines, nlines, outoff,
5220 			    GOT_DIFF_LINE_META);
5221 			if (err)
5222 				goto done;
5223 			free(id_str);
5224 			id_str = NULL;
5225 		}
5226 	}
5227 
5228 	err = got_object_commit_get_logmsg(&logmsg, commit);
5229 	if (err)
5230 		goto done;
5231 	s = logmsg;
5232 	while ((line = strsep(&s, "\n")) != NULL) {
5233 		n = fprintf(outfile, "%s\n", line);
5234 		if (n < 0) {
5235 			err = got_error_from_errno("fprintf");
5236 			goto done;
5237 		}
5238 		outoff += n;
5239 		err = add_line_metadata(lines, nlines, outoff,
5240 		    GOT_DIFF_LINE_LOGMSG);
5241 		if (err)
5242 			goto done;
5243 	}
5244 
5245 	TAILQ_FOREACH(pe, dsa->paths, entry) {
5246 		struct got_diff_changed_path *cp = pe->data;
5247 		int pad = dsa->max_path_len - pe->path_len + 1;
5248 
5249 		n = fprintf(outfile, "%c  %s%*c | %*d+ %*d-\n", cp->status,
5250 		    pe->path, pad, ' ', dsa->add_cols + 1, cp->add,
5251 		    dsa->rm_cols + 1, cp->rm);
5252 		if (n < 0) {
5253 			err = got_error_from_errno("fprintf");
5254 			goto done;
5255 		}
5256 		outoff += n;
5257 		err = add_line_metadata(lines, nlines, outoff,
5258 		    GOT_DIFF_LINE_CHANGES);
5259 		if (err)
5260 			goto done;
5261 	}
5262 
5263 	fputc('\n', outfile);
5264 	outoff++;
5265 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
5266 	if (err)
5267 		goto done;
5268 
5269 	n = fprintf(outfile,
5270 	    "%d file%s changed, %d insertion%s(+), %d deletion%s(-)\n",
5271 	    dsa->nfiles, dsa->nfiles > 1 ? "s" : "", dsa->ins,
5272 	    dsa->ins != 1 ? "s" : "", dsa->del, dsa->del != 1 ? "s" : "");
5273 	if (n < 0) {
5274 		err = got_error_from_errno("fprintf");
5275 		goto done;
5276 	}
5277 	outoff += n;
5278 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
5279 	if (err)
5280 		goto done;
5281 
5282 	fputc('\n', outfile);
5283 	outoff++;
5284 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
5285 done:
5286 	free(id_str);
5287 	free(logmsg);
5288 	free(refs_str);
5289 	got_object_commit_close(commit);
5290 	if (err) {
5291 		free(*lines);
5292 		*lines = NULL;
5293 		*nlines = 0;
5294 	}
5295 	return err;
5296 }
5297 
5298 static const struct got_error *
5299 create_diff(struct tog_diff_view_state *s)
5300 {
5301 	const struct got_error *err = NULL;
5302 	FILE *tmp_diff_file = NULL;
5303 	int obj_type;
5304 	struct got_diff_line *lines = NULL;
5305 	struct got_pathlist_head changed_paths;
5306 	struct got_commit_object *commit2 = NULL;
5307 
5308 	TAILQ_INIT(&changed_paths);
5309 
5310 	free(s->lines);
5311 	s->lines = malloc(sizeof(*s->lines));
5312 	if (s->lines == NULL)
5313 		return got_error_from_errno("malloc");
5314 	s->nlines = 0;
5315 
5316 	if (s->f && fclose(s->f) == EOF) {
5317 		s->f = NULL;
5318 		return got_error_from_errno("fclose");
5319 	}
5320 
5321 	s->f = got_opentemp();
5322 	if (s->f == NULL)
5323 		return got_error_from_errno("got_opentemp");
5324 
5325 	tmp_diff_file = got_opentemp();
5326 	if (tmp_diff_file == NULL)
5327 		return got_error_from_errno("got_opentemp");
5328 
5329 	if (s->id1)
5330 		err = got_object_get_type(&obj_type, s->repo, s->id1);
5331 	else
5332 		err = got_object_get_type(&obj_type, s->repo, s->id2);
5333 	if (err)
5334 		goto done;
5335 
5336 	switch (obj_type) {
5337 	case GOT_OBJ_TYPE_BLOB:
5338 		err = got_diff_objects_as_blobs(&s->lines, &s->nlines,
5339 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
5340 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
5341 		    s->ignore_whitespace, s->force_text_diff, NULL, s->repo,
5342 		    s->f);
5343 		break;
5344 	case GOT_OBJ_TYPE_TREE:
5345 		err = got_diff_objects_as_trees(&s->lines, &s->nlines,
5346 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
5347 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
5348 		    s->force_text_diff, NULL, s->repo, s->f);
5349 		break;
5350 	case GOT_OBJ_TYPE_COMMIT: {
5351 		const struct got_object_id_queue *parent_ids;
5352 		struct got_object_qid *pid;
5353 		struct got_reflist_head *refs;
5354 		size_t nlines = 0;
5355 		struct got_diffstat_cb_arg dsa = {
5356 			0, 0, 0, 0, 0, 0,
5357 			&changed_paths,
5358 			s->ignore_whitespace,
5359 			s->force_text_diff,
5360 			tog_diff_algo
5361 		};
5362 
5363 		lines = malloc(sizeof(*lines));
5364 		if (lines == NULL) {
5365 			err = got_error_from_errno("malloc");
5366 			goto done;
5367 		}
5368 
5369 		/* build diff first in tmp file then append to commit info */
5370 		err = got_diff_objects_as_commits(&lines, &nlines,
5371 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
5372 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
5373 		    s->force_text_diff, &dsa, s->repo, tmp_diff_file);
5374 		if (err)
5375 			break;
5376 
5377 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
5378 		/* Show commit info if we're diffing to a parent/root commit. */
5379 		if (s->id1 == NULL) {
5380 			err = write_commit_info(&s->lines, &s->nlines, s->id2,
5381 			    refs, s->repo, s->ignore_whitespace,
5382 			    s->force_text_diff, &dsa, s->f);
5383 			if (err)
5384 				goto done;
5385 		} else {
5386 			err = got_object_open_as_commit(&commit2, s->repo,
5387 			    s->id2);
5388 			if (err)
5389 				goto done;
5390 
5391 			parent_ids = got_object_commit_get_parent_ids(commit2);
5392 			STAILQ_FOREACH(pid, parent_ids, entry) {
5393 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
5394 					err = write_commit_info(&s->lines,
5395 					    &s->nlines, s->id2, refs, s->repo,
5396 					    s->ignore_whitespace,
5397 					    s->force_text_diff, &dsa, s->f);
5398 					if (err)
5399 						goto done;
5400 					break;
5401 				}
5402 			}
5403 		}
5404 
5405 		err = cat_diff(s->f, tmp_diff_file, &s->lines, &s->nlines,
5406 		    lines, nlines);
5407 		break;
5408 	}
5409 	default:
5410 		err = got_error(GOT_ERR_OBJ_TYPE);
5411 		break;
5412 	}
5413 done:
5414 	free(lines);
5415 	if (commit2 != NULL)
5416 		got_object_commit_close(commit2);
5417 	got_pathlist_free(&changed_paths, GOT_PATHLIST_FREE_ALL);
5418 	if (s->f && fflush(s->f) != 0 && err == NULL)
5419 		err = got_error_from_errno("fflush");
5420 	if (tmp_diff_file && fclose(tmp_diff_file) == EOF && err == NULL)
5421 		err = got_error_from_errno("fclose");
5422 	return err;
5423 }
5424 
5425 static void
5426 diff_view_indicate_progress(struct tog_view *view)
5427 {
5428 	mvwaddstr(view->window, 0, 0, "diffing...");
5429 	update_panels();
5430 	doupdate();
5431 }
5432 
5433 static const struct got_error *
5434 search_start_diff_view(struct tog_view *view)
5435 {
5436 	struct tog_diff_view_state *s = &view->state.diff;
5437 
5438 	s->matched_line = 0;
5439 	return NULL;
5440 }
5441 
5442 static void
5443 search_setup_diff_view(struct tog_view *view, FILE **f, off_t **line_offsets,
5444     size_t *nlines, int **first, int **last, int **match, int **selected)
5445 {
5446 	struct tog_diff_view_state *s = &view->state.diff;
5447 
5448 	*f = s->f;
5449 	*nlines = s->nlines;
5450 	*line_offsets = NULL;
5451 	*match = &s->matched_line;
5452 	*first = &s->first_displayed_line;
5453 	*last = &s->last_displayed_line;
5454 	*selected = &s->selected_line;
5455 }
5456 
5457 static const struct got_error *
5458 search_next_view_match(struct tog_view *view)
5459 {
5460 	const struct got_error *err = NULL;
5461 	FILE *f;
5462 	int lineno;
5463 	char *line = NULL;
5464 	size_t linesize = 0;
5465 	ssize_t linelen;
5466 	off_t *line_offsets;
5467 	size_t nlines = 0;
5468 	int *first, *last, *match, *selected;
5469 
5470 	if (!view->search_setup)
5471 		return got_error_msg(GOT_ERR_NOT_IMPL,
5472 		    "view search not supported");
5473 	view->search_setup(view, &f, &line_offsets, &nlines, &first, &last,
5474 	    &match, &selected);
5475 
5476 	if (!view->searching) {
5477 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5478 		return NULL;
5479 	}
5480 
5481 	if (*match) {
5482 		if (view->searching == TOG_SEARCH_FORWARD)
5483 			lineno = *first + 1;
5484 		else
5485 			lineno = *first - 1;
5486 	} else
5487 		lineno = *first - 1 + *selected;
5488 
5489 	while (1) {
5490 		off_t offset;
5491 
5492 		if (lineno <= 0 || lineno > nlines) {
5493 			if (*match == 0) {
5494 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5495 				break;
5496 			}
5497 
5498 			if (view->searching == TOG_SEARCH_FORWARD)
5499 				lineno = 1;
5500 			else
5501 				lineno = nlines;
5502 		}
5503 
5504 		offset = view->type == TOG_VIEW_DIFF ?
5505 		    view->state.diff.lines[lineno - 1].offset :
5506 		    line_offsets[lineno - 1];
5507 		if (fseeko(f, offset, SEEK_SET) != 0) {
5508 			free(line);
5509 			return got_error_from_errno("fseeko");
5510 		}
5511 		linelen = getline(&line, &linesize, f);
5512 		if (linelen != -1) {
5513 			char *exstr;
5514 			err = expand_tab(&exstr, line);
5515 			if (err)
5516 				break;
5517 			if (match_line(exstr, &view->regex, 1,
5518 			    &view->regmatch)) {
5519 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5520 				*match = lineno;
5521 				free(exstr);
5522 				break;
5523 			}
5524 			free(exstr);
5525 		}
5526 		if (view->searching == TOG_SEARCH_FORWARD)
5527 			lineno++;
5528 		else
5529 			lineno--;
5530 	}
5531 	free(line);
5532 
5533 	if (*match) {
5534 		*first = *match;
5535 		*selected = 1;
5536 	}
5537 
5538 	return err;
5539 }
5540 
5541 static const struct got_error *
5542 close_diff_view(struct tog_view *view)
5543 {
5544 	const struct got_error *err = NULL;
5545 	struct tog_diff_view_state *s = &view->state.diff;
5546 
5547 	free(s->id1);
5548 	s->id1 = NULL;
5549 	free(s->id2);
5550 	s->id2 = NULL;
5551 	if (s->f && fclose(s->f) == EOF)
5552 		err = got_error_from_errno("fclose");
5553 	s->f = NULL;
5554 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
5555 		err = got_error_from_errno("fclose");
5556 	s->f1 = NULL;
5557 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
5558 		err = got_error_from_errno("fclose");
5559 	s->f2 = NULL;
5560 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
5561 		err = got_error_from_errno("close");
5562 	s->fd1 = -1;
5563 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
5564 		err = got_error_from_errno("close");
5565 	s->fd2 = -1;
5566 	free(s->lines);
5567 	s->lines = NULL;
5568 	s->nlines = 0;
5569 	return err;
5570 }
5571 
5572 static const struct got_error *
5573 open_diff_view(struct tog_view *view, struct got_object_id *id1,
5574     struct got_object_id *id2, const char *label1, const char *label2,
5575     int diff_context, int ignore_whitespace, int force_text_diff,
5576     struct tog_view *parent_view, struct got_repository *repo)
5577 {
5578 	const struct got_error *err;
5579 	struct tog_diff_view_state *s = &view->state.diff;
5580 
5581 	memset(s, 0, sizeof(*s));
5582 	s->fd1 = -1;
5583 	s->fd2 = -1;
5584 
5585 	if (id1 != NULL && id2 != NULL) {
5586 		int type1, type2;
5587 
5588 		err = got_object_get_type(&type1, repo, id1);
5589 		if (err)
5590 			goto done;
5591 		err = got_object_get_type(&type2, repo, id2);
5592 		if (err)
5593 			goto done;
5594 
5595 		if (type1 != type2) {
5596 			err = got_error(GOT_ERR_OBJ_TYPE);
5597 			goto done;
5598 		}
5599 	}
5600 	s->first_displayed_line = 1;
5601 	s->last_displayed_line = view->nlines;
5602 	s->selected_line = 1;
5603 	s->repo = repo;
5604 	s->label1 = label1;
5605 	s->label2 = label2;
5606 
5607 	if (id1) {
5608 		s->id1 = got_object_id_dup(id1);
5609 		if (s->id1 == NULL) {
5610 			err = got_error_from_errno("got_object_id_dup");
5611 			goto done;
5612 		}
5613 	} else
5614 		s->id1 = NULL;
5615 
5616 	s->id2 = got_object_id_dup(id2);
5617 	if (s->id2 == NULL) {
5618 		err = got_error_from_errno("got_object_id_dup");
5619 		goto done;
5620 	}
5621 
5622 	s->f1 = got_opentemp();
5623 	if (s->f1 == NULL) {
5624 		err = got_error_from_errno("got_opentemp");
5625 		goto done;
5626 	}
5627 
5628 	s->f2 = got_opentemp();
5629 	if (s->f2 == NULL) {
5630 		err = got_error_from_errno("got_opentemp");
5631 		goto done;
5632 	}
5633 
5634 	s->fd1 = got_opentempfd();
5635 	if (s->fd1 == -1) {
5636 		err = got_error_from_errno("got_opentempfd");
5637 		goto done;
5638 	}
5639 
5640 	s->fd2 = got_opentempfd();
5641 	if (s->fd2 == -1) {
5642 		err = got_error_from_errno("got_opentempfd");
5643 		goto done;
5644 	}
5645 
5646 	s->diff_context = diff_context;
5647 	s->ignore_whitespace = ignore_whitespace;
5648 	s->force_text_diff = force_text_diff;
5649 	s->parent_view = parent_view;
5650 	s->repo = repo;
5651 
5652 	if (has_colors() && getenv("TOG_COLORS") != NULL && !using_mock_io) {
5653 		int rc;
5654 
5655 		rc = init_pair(GOT_DIFF_LINE_MINUS,
5656 		    get_color_value("TOG_COLOR_DIFF_MINUS"), -1);
5657 		if (rc != ERR)
5658 			rc = init_pair(GOT_DIFF_LINE_PLUS,
5659 			    get_color_value("TOG_COLOR_DIFF_PLUS"), -1);
5660 		if (rc != ERR)
5661 			rc = init_pair(GOT_DIFF_LINE_HUNK,
5662 			    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"), -1);
5663 		if (rc != ERR)
5664 			rc = init_pair(GOT_DIFF_LINE_META,
5665 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5666 		if (rc != ERR)
5667 			rc = init_pair(GOT_DIFF_LINE_CHANGES,
5668 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5669 		if (rc != ERR)
5670 			rc = init_pair(GOT_DIFF_LINE_BLOB_MIN,
5671 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5672 		if (rc != ERR)
5673 			rc = init_pair(GOT_DIFF_LINE_BLOB_PLUS,
5674 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5675 		if (rc != ERR)
5676 			rc = init_pair(GOT_DIFF_LINE_AUTHOR,
5677 			    get_color_value("TOG_COLOR_AUTHOR"), -1);
5678 		if (rc != ERR)
5679 			rc = init_pair(GOT_DIFF_LINE_DATE,
5680 			    get_color_value("TOG_COLOR_DATE"), -1);
5681 		if (rc == ERR) {
5682 			err = got_error(GOT_ERR_RANGE);
5683 			goto done;
5684 		}
5685 	}
5686 
5687 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
5688 	    view_is_splitscreen(view))
5689 		show_log_view(parent_view); /* draw border */
5690 	diff_view_indicate_progress(view);
5691 
5692 	err = create_diff(s);
5693 
5694 	view->show = show_diff_view;
5695 	view->input = input_diff_view;
5696 	view->reset = reset_diff_view;
5697 	view->close = close_diff_view;
5698 	view->search_start = search_start_diff_view;
5699 	view->search_setup = search_setup_diff_view;
5700 	view->search_next = search_next_view_match;
5701 done:
5702 	if (err) {
5703 		if (view->close == NULL)
5704 			close_diff_view(view);
5705 		view_close(view);
5706 	}
5707 	return err;
5708 }
5709 
5710 static const struct got_error *
5711 show_diff_view(struct tog_view *view)
5712 {
5713 	const struct got_error *err;
5714 	struct tog_diff_view_state *s = &view->state.diff;
5715 	char *id_str1 = NULL, *id_str2, *header;
5716 	const char *label1, *label2;
5717 
5718 	if (s->id1) {
5719 		err = got_object_id_str(&id_str1, s->id1);
5720 		if (err)
5721 			return err;
5722 		label1 = s->label1 ? s->label1 : id_str1;
5723 	} else
5724 		label1 = "/dev/null";
5725 
5726 	err = got_object_id_str(&id_str2, s->id2);
5727 	if (err)
5728 		return err;
5729 	label2 = s->label2 ? s->label2 : id_str2;
5730 
5731 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
5732 		err = got_error_from_errno("asprintf");
5733 		free(id_str1);
5734 		free(id_str2);
5735 		return err;
5736 	}
5737 	free(id_str1);
5738 	free(id_str2);
5739 
5740 	err = draw_file(view, header);
5741 	free(header);
5742 	return err;
5743 }
5744 
5745 static const struct got_error *
5746 set_selected_commit(struct tog_diff_view_state *s,
5747     struct commit_queue_entry *entry)
5748 {
5749 	const struct got_error *err;
5750 	const struct got_object_id_queue *parent_ids;
5751 	struct got_commit_object *selected_commit;
5752 	struct got_object_qid *pid;
5753 
5754 	free(s->id2);
5755 	s->id2 = got_object_id_dup(entry->id);
5756 	if (s->id2 == NULL)
5757 		return got_error_from_errno("got_object_id_dup");
5758 
5759 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
5760 	if (err)
5761 		return err;
5762 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
5763 	free(s->id1);
5764 	pid = STAILQ_FIRST(parent_ids);
5765 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
5766 	got_object_commit_close(selected_commit);
5767 	return NULL;
5768 }
5769 
5770 static const struct got_error *
5771 reset_diff_view(struct tog_view *view)
5772 {
5773 	struct tog_diff_view_state *s = &view->state.diff;
5774 
5775 	view->count = 0;
5776 	wclear(view->window);
5777 	s->first_displayed_line = 1;
5778 	s->last_displayed_line = view->nlines;
5779 	s->matched_line = 0;
5780 	diff_view_indicate_progress(view);
5781 	return create_diff(s);
5782 }
5783 
5784 static void
5785 diff_prev_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
5786 {
5787 	int start, i;
5788 
5789 	i = start = s->first_displayed_line - 1;
5790 
5791 	while (s->lines[i].type != type) {
5792 		if (i == 0)
5793 			i = s->nlines - 1;
5794 		if (--i == start)
5795 			return; /* do nothing, requested type not in file */
5796 	}
5797 
5798 	s->selected_line = 1;
5799 	s->first_displayed_line = i;
5800 }
5801 
5802 static void
5803 diff_next_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
5804 {
5805 	int start, i;
5806 
5807 	i = start = s->first_displayed_line + 1;
5808 
5809 	while (s->lines[i].type != type) {
5810 		if (i == s->nlines - 1)
5811 			i = 0;
5812 		if (++i == start)
5813 			return; /* do nothing, requested type not in file */
5814 	}
5815 
5816 	s->selected_line = 1;
5817 	s->first_displayed_line = i;
5818 }
5819 
5820 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
5821     int, int, int);
5822 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
5823     int, int);
5824 
5825 static const struct got_error *
5826 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
5827 {
5828 	const struct got_error *err = NULL;
5829 	struct tog_diff_view_state *s = &view->state.diff;
5830 	struct tog_log_view_state *ls;
5831 	struct commit_queue_entry *old_selected_entry;
5832 	char *line = NULL;
5833 	size_t linesize = 0;
5834 	ssize_t linelen;
5835 	int i, nscroll = view->nlines - 1, up = 0;
5836 
5837 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
5838 
5839 	switch (ch) {
5840 	case '0':
5841 	case '$':
5842 	case KEY_RIGHT:
5843 	case 'l':
5844 	case KEY_LEFT:
5845 	case 'h':
5846 		horizontal_scroll_input(view, ch);
5847 		break;
5848 	case 'a':
5849 	case 'w':
5850 		if (ch == 'a') {
5851 			s->force_text_diff = !s->force_text_diff;
5852 			view->action = s->force_text_diff ?
5853 			    "force ASCII text enabled" :
5854 			    "force ASCII text disabled";
5855 		}
5856 		else if (ch == 'w') {
5857 			s->ignore_whitespace = !s->ignore_whitespace;
5858 			view->action = s->ignore_whitespace ?
5859 			    "ignore whitespace enabled" :
5860 			    "ignore whitespace disabled";
5861 		}
5862 		err = reset_diff_view(view);
5863 		break;
5864 	case 'g':
5865 	case KEY_HOME:
5866 		s->first_displayed_line = 1;
5867 		view->count = 0;
5868 		break;
5869 	case 'G':
5870 	case KEY_END:
5871 		view->count = 0;
5872 		if (s->eof)
5873 			break;
5874 
5875 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
5876 		s->eof = 1;
5877 		break;
5878 	case 'k':
5879 	case KEY_UP:
5880 	case CTRL('p'):
5881 		if (s->first_displayed_line > 1)
5882 			s->first_displayed_line--;
5883 		else
5884 			view->count = 0;
5885 		break;
5886 	case CTRL('u'):
5887 	case 'u':
5888 		nscroll /= 2;
5889 		/* FALL THROUGH */
5890 	case KEY_PPAGE:
5891 	case CTRL('b'):
5892 	case 'b':
5893 		if (s->first_displayed_line == 1) {
5894 			view->count = 0;
5895 			break;
5896 		}
5897 		i = 0;
5898 		while (i++ < nscroll && s->first_displayed_line > 1)
5899 			s->first_displayed_line--;
5900 		break;
5901 	case 'j':
5902 	case KEY_DOWN:
5903 	case CTRL('n'):
5904 		if (!s->eof)
5905 			s->first_displayed_line++;
5906 		else
5907 			view->count = 0;
5908 		break;
5909 	case CTRL('d'):
5910 	case 'd':
5911 		nscroll /= 2;
5912 		/* FALL THROUGH */
5913 	case KEY_NPAGE:
5914 	case CTRL('f'):
5915 	case 'f':
5916 	case ' ':
5917 		if (s->eof) {
5918 			view->count = 0;
5919 			break;
5920 		}
5921 		i = 0;
5922 		while (!s->eof && i++ < nscroll) {
5923 			linelen = getline(&line, &linesize, s->f);
5924 			s->first_displayed_line++;
5925 			if (linelen == -1) {
5926 				if (feof(s->f)) {
5927 					s->eof = 1;
5928 				} else
5929 					err = got_ferror(s->f, GOT_ERR_IO);
5930 				break;
5931 			}
5932 		}
5933 		free(line);
5934 		break;
5935 	case '(':
5936 		diff_prev_index(s, GOT_DIFF_LINE_BLOB_MIN);
5937 		break;
5938 	case ')':
5939 		diff_next_index(s, GOT_DIFF_LINE_BLOB_MIN);
5940 		break;
5941 	case '{':
5942 		diff_prev_index(s, GOT_DIFF_LINE_HUNK);
5943 		break;
5944 	case '}':
5945 		diff_next_index(s, GOT_DIFF_LINE_HUNK);
5946 		break;
5947 	case '[':
5948 		if (s->diff_context > 0) {
5949 			s->diff_context--;
5950 			s->matched_line = 0;
5951 			diff_view_indicate_progress(view);
5952 			err = create_diff(s);
5953 			if (s->first_displayed_line + view->nlines - 1 >
5954 			    s->nlines) {
5955 				s->first_displayed_line = 1;
5956 				s->last_displayed_line = view->nlines;
5957 			}
5958 		} else
5959 			view->count = 0;
5960 		break;
5961 	case ']':
5962 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
5963 			s->diff_context++;
5964 			s->matched_line = 0;
5965 			diff_view_indicate_progress(view);
5966 			err = create_diff(s);
5967 		} else
5968 			view->count = 0;
5969 		break;
5970 	case '<':
5971 	case ',':
5972 	case 'K':
5973 		up = 1;
5974 		/* FALL THROUGH */
5975 	case '>':
5976 	case '.':
5977 	case 'J':
5978 		if (s->parent_view == NULL) {
5979 			view->count = 0;
5980 			break;
5981 		}
5982 		s->parent_view->count = view->count;
5983 
5984 		if (s->parent_view->type == TOG_VIEW_LOG) {
5985 			ls = &s->parent_view->state.log;
5986 			old_selected_entry = ls->selected_entry;
5987 
5988 			err = input_log_view(NULL, s->parent_view,
5989 			    up ? KEY_UP : KEY_DOWN);
5990 			if (err)
5991 				break;
5992 			view->count = s->parent_view->count;
5993 
5994 			if (old_selected_entry == ls->selected_entry)
5995 				break;
5996 
5997 			err = set_selected_commit(s, ls->selected_entry);
5998 			if (err)
5999 				break;
6000 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
6001 			struct tog_blame_view_state *bs;
6002 			struct got_object_id *id, *prev_id;
6003 
6004 			bs = &s->parent_view->state.blame;
6005 			prev_id = get_annotation_for_line(bs->blame.lines,
6006 			    bs->blame.nlines, bs->last_diffed_line);
6007 
6008 			err = input_blame_view(&view, s->parent_view,
6009 			    up ? KEY_UP : KEY_DOWN);
6010 			if (err)
6011 				break;
6012 			view->count = s->parent_view->count;
6013 
6014 			if (prev_id == NULL)
6015 				break;
6016 			id = get_selected_commit_id(bs->blame.lines,
6017 			    bs->blame.nlines, bs->first_displayed_line,
6018 			    bs->selected_line);
6019 			if (id == NULL)
6020 				break;
6021 
6022 			if (!got_object_id_cmp(prev_id, id))
6023 				break;
6024 
6025 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
6026 			if (err)
6027 				break;
6028 		}
6029 		s->first_displayed_line = 1;
6030 		s->last_displayed_line = view->nlines;
6031 		s->matched_line = 0;
6032 		view->x = 0;
6033 
6034 		diff_view_indicate_progress(view);
6035 		err = create_diff(s);
6036 		break;
6037 	default:
6038 		view->count = 0;
6039 		break;
6040 	}
6041 
6042 	return err;
6043 }
6044 
6045 static const struct got_error *
6046 cmd_diff(int argc, char *argv[])
6047 {
6048 	const struct got_error *error;
6049 	struct got_repository *repo = NULL;
6050 	struct got_worktree *worktree = NULL;
6051 	struct got_object_id *id1 = NULL, *id2 = NULL;
6052 	char *repo_path = NULL, *cwd = NULL;
6053 	char *id_str1 = NULL, *id_str2 = NULL;
6054 	char *keyword_idstr1 = NULL, *keyword_idstr2 = NULL;
6055 	char *label1 = NULL, *label2 = NULL;
6056 	int diff_context = 3, ignore_whitespace = 0;
6057 	int ch, force_text_diff = 0;
6058 	const char *errstr;
6059 	struct tog_view *view;
6060 	int *pack_fds = NULL;
6061 
6062 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
6063 		switch (ch) {
6064 		case 'a':
6065 			force_text_diff = 1;
6066 			break;
6067 		case 'C':
6068 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
6069 			    &errstr);
6070 			if (errstr != NULL)
6071 				errx(1, "number of context lines is %s: %s",
6072 				    errstr, errstr);
6073 			break;
6074 		case 'r':
6075 			repo_path = realpath(optarg, NULL);
6076 			if (repo_path == NULL)
6077 				return got_error_from_errno2("realpath",
6078 				    optarg);
6079 			got_path_strip_trailing_slashes(repo_path);
6080 			break;
6081 		case 'w':
6082 			ignore_whitespace = 1;
6083 			break;
6084 		default:
6085 			usage_diff();
6086 			/* NOTREACHED */
6087 		}
6088 	}
6089 
6090 	argc -= optind;
6091 	argv += optind;
6092 
6093 	if (argc == 0) {
6094 		usage_diff(); /* TODO show local worktree changes */
6095 	} else if (argc == 2) {
6096 		id_str1 = argv[0];
6097 		id_str2 = argv[1];
6098 	} else
6099 		usage_diff();
6100 
6101 	error = got_repo_pack_fds_open(&pack_fds);
6102 	if (error)
6103 		goto done;
6104 
6105 	if (repo_path == NULL) {
6106 		cwd = getcwd(NULL, 0);
6107 		if (cwd == NULL)
6108 			return got_error_from_errno("getcwd");
6109 		error = got_worktree_open(&worktree, cwd, NULL);
6110 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6111 			goto done;
6112 		if (worktree)
6113 			repo_path =
6114 			    strdup(got_worktree_get_repo_path(worktree));
6115 		else
6116 			repo_path = strdup(cwd);
6117 		if (repo_path == NULL) {
6118 			error = got_error_from_errno("strdup");
6119 			goto done;
6120 		}
6121 	}
6122 
6123 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6124 	if (error)
6125 		goto done;
6126 
6127 	init_curses();
6128 
6129 	error = apply_unveil(got_repo_get_path(repo), NULL);
6130 	if (error)
6131 		goto done;
6132 
6133 	error = tog_load_refs(repo, 0);
6134 	if (error)
6135 		goto done;
6136 
6137 	if (id_str1 != NULL) {
6138 		error = got_keyword_to_idstr(&keyword_idstr1, id_str1,
6139 		    repo, worktree);
6140 		if (error != NULL)
6141 			goto done;
6142 		if (keyword_idstr1 != NULL)
6143 			id_str1 = keyword_idstr1;
6144 	}
6145 	if (id_str2 != NULL) {
6146 		error = got_keyword_to_idstr(&keyword_idstr2, id_str2,
6147 		    repo, worktree);
6148 		if (error != NULL)
6149 			goto done;
6150 		if (keyword_idstr2 != NULL)
6151 			id_str2 = keyword_idstr2;
6152 	}
6153 
6154 	error = got_repo_match_object_id(&id1, &label1, id_str1,
6155 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
6156 	if (error)
6157 		goto done;
6158 
6159 	error = got_repo_match_object_id(&id2, &label2, id_str2,
6160 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
6161 	if (error)
6162 		goto done;
6163 
6164 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
6165 	if (view == NULL) {
6166 		error = got_error_from_errno("view_open");
6167 		goto done;
6168 	}
6169 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
6170 	    ignore_whitespace, force_text_diff, NULL,  repo);
6171 	if (error)
6172 		goto done;
6173 
6174 	if (worktree) {
6175 		error = set_tog_base_commit(repo, worktree);
6176 		if (error != NULL)
6177 			goto done;
6178 
6179 		/* Release work tree lock. */
6180 		got_worktree_close(worktree);
6181 		worktree = NULL;
6182 	}
6183 
6184 	error = view_loop(view);
6185 
6186 done:
6187 	free(tog_base_commit.id);
6188 	free(keyword_idstr1);
6189 	free(keyword_idstr2);
6190 	free(label1);
6191 	free(label2);
6192 	free(id1);
6193 	free(id2);
6194 	free(repo_path);
6195 	free(cwd);
6196 	if (repo) {
6197 		const struct got_error *close_err = got_repo_close(repo);
6198 		if (error == NULL)
6199 			error = close_err;
6200 	}
6201 	if (worktree)
6202 		got_worktree_close(worktree);
6203 	if (pack_fds) {
6204 		const struct got_error *pack_err =
6205 		    got_repo_pack_fds_close(pack_fds);
6206 		if (error == NULL)
6207 			error = pack_err;
6208 	}
6209 	tog_free_refs();
6210 	return error;
6211 }
6212 
6213 __dead static void
6214 usage_blame(void)
6215 {
6216 	endwin();
6217 	fprintf(stderr,
6218 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
6219 	    getprogname());
6220 	exit(1);
6221 }
6222 
6223 struct tog_blame_line {
6224 	int annotated;
6225 	struct got_object_id *id;
6226 };
6227 
6228 static const struct got_error *
6229 draw_blame(struct tog_view *view)
6230 {
6231 	struct tog_blame_view_state *s = &view->state.blame;
6232 	struct tog_blame *blame = &s->blame;
6233 	regmatch_t *regmatch = &view->regmatch;
6234 	const struct got_error *err;
6235 	int lineno = 0, nprinted = 0;
6236 	char *line = NULL;
6237 	size_t linesize = 0;
6238 	ssize_t linelen;
6239 	wchar_t *wline;
6240 	int width;
6241 	struct tog_blame_line *blame_line;
6242 	struct got_object_id *prev_id = NULL;
6243 	char *id_str;
6244 	struct tog_color *tc;
6245 
6246 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
6247 	if (err)
6248 		return err;
6249 
6250 	rewind(blame->f);
6251 	werase(view->window);
6252 
6253 	if (asprintf(&line, "commit %s", id_str) == -1) {
6254 		err = got_error_from_errno("asprintf");
6255 		free(id_str);
6256 		return err;
6257 	}
6258 
6259 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6260 	free(line);
6261 	line = NULL;
6262 	if (err)
6263 		return err;
6264 	if (view_needs_focus_indication(view))
6265 		wstandout(view->window);
6266 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6267 	if (tc)
6268 		wattr_on(view->window, COLOR_PAIR(tc->colorpair), NULL);
6269 	waddwstr(view->window, wline);
6270 	while (width++ < view->ncols)
6271 		waddch(view->window, ' ');
6272 	if (tc)
6273 		wattr_off(view->window, COLOR_PAIR(tc->colorpair), NULL);
6274 	if (view_needs_focus_indication(view))
6275 		wstandend(view->window);
6276 	free(wline);
6277 	wline = NULL;
6278 
6279 	if (view->gline > blame->nlines)
6280 		view->gline = blame->nlines;
6281 
6282 	if (tog_io.wait_for_ui) {
6283 		struct tog_blame_thread_args *bta = &s->blame.thread_args;
6284 		int rc;
6285 
6286 		rc = pthread_cond_wait(&bta->blame_complete, &tog_mutex);
6287 		if (rc)
6288 			return got_error_set_errno(rc, "pthread_cond_wait");
6289 		tog_io.wait_for_ui = 0;
6290 	}
6291 
6292 	if (asprintf(&line, "[%d/%d] %s%s", view->gline ? view->gline :
6293 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
6294 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
6295 		free(id_str);
6296 		return got_error_from_errno("asprintf");
6297 	}
6298 	free(id_str);
6299 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6300 	free(line);
6301 	line = NULL;
6302 	if (err)
6303 		return err;
6304 	waddwstr(view->window, wline);
6305 	free(wline);
6306 	wline = NULL;
6307 	if (width < view->ncols - 1)
6308 		waddch(view->window, '\n');
6309 
6310 	s->eof = 0;
6311 	view->maxx = 0;
6312 	while (nprinted < view->nlines - 2) {
6313 		linelen = getline(&line, &linesize, blame->f);
6314 		if (linelen == -1) {
6315 			if (feof(blame->f)) {
6316 				s->eof = 1;
6317 				break;
6318 			}
6319 			free(line);
6320 			return got_ferror(blame->f, GOT_ERR_IO);
6321 		}
6322 		if (++lineno < s->first_displayed_line)
6323 			continue;
6324 		if (view->gline && !gotoline(view, &lineno, &nprinted))
6325 			continue;
6326 
6327 		/* Set view->maxx based on full line length. */
6328 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
6329 		if (err) {
6330 			free(line);
6331 			return err;
6332 		}
6333 		free(wline);
6334 		wline = NULL;
6335 		view->maxx = MAX(view->maxx, width);
6336 
6337 		if (nprinted == s->selected_line - 1)
6338 			wstandout(view->window);
6339 
6340 		if (blame->nlines > 0) {
6341 			blame_line = &blame->lines[lineno - 1];
6342 			if (blame_line->annotated && prev_id &&
6343 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
6344 			    !(nprinted == s->selected_line - 1)) {
6345 				waddstr(view->window, "        ");
6346 			} else if (blame_line->annotated) {
6347 				char *id_str;
6348 				err = got_object_id_str(&id_str,
6349 				    blame_line->id);
6350 				if (err) {
6351 					free(line);
6352 					return err;
6353 				}
6354 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6355 				if (tc)
6356 					wattr_on(view->window,
6357 					    COLOR_PAIR(tc->colorpair), NULL);
6358 				wprintw(view->window, "%.8s", id_str);
6359 				if (tc)
6360 					wattr_off(view->window,
6361 					    COLOR_PAIR(tc->colorpair), NULL);
6362 				free(id_str);
6363 				prev_id = blame_line->id;
6364 			} else {
6365 				waddstr(view->window, "........");
6366 				prev_id = NULL;
6367 			}
6368 		} else {
6369 			waddstr(view->window, "........");
6370 			prev_id = NULL;
6371 		}
6372 
6373 		if (nprinted == s->selected_line - 1)
6374 			wstandend(view->window);
6375 		waddstr(view->window, " ");
6376 
6377 		if (view->ncols <= 9) {
6378 			width = 9;
6379 		} else if (s->first_displayed_line + nprinted ==
6380 		    s->matched_line &&
6381 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
6382 			err = add_matched_line(&width, line, view->ncols - 9, 9,
6383 			    view->window, view->x, regmatch);
6384 			if (err) {
6385 				free(line);
6386 				return err;
6387 			}
6388 			width += 9;
6389 		} else {
6390 			int skip;
6391 			err = format_line(&wline, &width, &skip, line,
6392 			    view->x, view->ncols - 9, 9, 1);
6393 			if (err) {
6394 				free(line);
6395 				return err;
6396 			}
6397 			waddwstr(view->window, &wline[skip]);
6398 			width += 9;
6399 			free(wline);
6400 			wline = NULL;
6401 		}
6402 
6403 		if (width <= view->ncols - 1)
6404 			waddch(view->window, '\n');
6405 		if (++nprinted == 1)
6406 			s->first_displayed_line = lineno;
6407 	}
6408 	free(line);
6409 	s->last_displayed_line = lineno;
6410 
6411 	view_border(view);
6412 
6413 	return NULL;
6414 }
6415 
6416 static const struct got_error *
6417 blame_cb(void *arg, int nlines, int lineno,
6418     struct got_commit_object *commit, struct got_object_id *id)
6419 {
6420 	const struct got_error *err = NULL;
6421 	struct tog_blame_cb_args *a = arg;
6422 	struct tog_blame_line *line;
6423 	int errcode;
6424 
6425 	if (nlines != a->nlines ||
6426 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
6427 		return got_error(GOT_ERR_RANGE);
6428 
6429 	errcode = pthread_mutex_lock(&tog_mutex);
6430 	if (errcode)
6431 		return got_error_set_errno(errcode, "pthread_mutex_lock");
6432 
6433 	if (*a->quit) {	/* user has quit the blame view */
6434 		err = got_error(GOT_ERR_ITER_COMPLETED);
6435 		goto done;
6436 	}
6437 
6438 	if (lineno == -1)
6439 		goto done; /* no change in this commit */
6440 
6441 	line = &a->lines[lineno - 1];
6442 	if (line->annotated)
6443 		goto done;
6444 
6445 	line->id = got_object_id_dup(id);
6446 	if (line->id == NULL) {
6447 		err = got_error_from_errno("got_object_id_dup");
6448 		goto done;
6449 	}
6450 	line->annotated = 1;
6451 done:
6452 	errcode = pthread_mutex_unlock(&tog_mutex);
6453 	if (errcode)
6454 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
6455 	return err;
6456 }
6457 
6458 static void *
6459 blame_thread(void *arg)
6460 {
6461 	const struct got_error *err, *close_err;
6462 	struct tog_blame_thread_args *ta = arg;
6463 	struct tog_blame_cb_args *a = ta->cb_args;
6464 	int errcode, fd1 = -1, fd2 = -1;
6465 	FILE *f1 = NULL, *f2 = NULL;
6466 
6467 	fd1 = got_opentempfd();
6468 	if (fd1 == -1)
6469 		return (void *)got_error_from_errno("got_opentempfd");
6470 
6471 	fd2 = got_opentempfd();
6472 	if (fd2 == -1) {
6473 		err = got_error_from_errno("got_opentempfd");
6474 		goto done;
6475 	}
6476 
6477 	f1 = got_opentemp();
6478 	if (f1 == NULL) {
6479 		err = (void *)got_error_from_errno("got_opentemp");
6480 		goto done;
6481 	}
6482 	f2 = got_opentemp();
6483 	if (f2 == NULL) {
6484 		err = (void *)got_error_from_errno("got_opentemp");
6485 		goto done;
6486 	}
6487 
6488 	err = block_signals_used_by_main_thread();
6489 	if (err)
6490 		goto done;
6491 
6492 	err = got_blame(ta->path, a->commit_id, ta->repo,
6493 	    tog_diff_algo, blame_cb, ta->cb_args,
6494 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
6495 	if (err && err->code == GOT_ERR_CANCELLED)
6496 		err = NULL;
6497 
6498 	errcode = pthread_mutex_lock(&tog_mutex);
6499 	if (errcode) {
6500 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
6501 		goto done;
6502 	}
6503 
6504 	close_err = got_repo_close(ta->repo);
6505 	if (err == NULL)
6506 		err = close_err;
6507 	ta->repo = NULL;
6508 	*ta->complete = 1;
6509 
6510 	if (tog_io.wait_for_ui) {
6511 		errcode = pthread_cond_signal(&ta->blame_complete);
6512 		if (errcode && err == NULL)
6513 			err = got_error_set_errno(errcode,
6514 			    "pthread_cond_signal");
6515 	}
6516 
6517 	errcode = pthread_mutex_unlock(&tog_mutex);
6518 	if (errcode && err == NULL)
6519 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
6520 
6521 done:
6522 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
6523 		err = got_error_from_errno("close");
6524 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
6525 		err = got_error_from_errno("close");
6526 	if (f1 && fclose(f1) == EOF && err == NULL)
6527 		err = got_error_from_errno("fclose");
6528 	if (f2 && fclose(f2) == EOF && err == NULL)
6529 		err = got_error_from_errno("fclose");
6530 
6531 	return (void *)err;
6532 }
6533 
6534 static struct got_object_id *
6535 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
6536     int first_displayed_line, int selected_line)
6537 {
6538 	struct tog_blame_line *line;
6539 
6540 	if (nlines <= 0)
6541 		return NULL;
6542 
6543 	line = &lines[first_displayed_line - 1 + selected_line - 1];
6544 	if (!line->annotated)
6545 		return NULL;
6546 
6547 	return line->id;
6548 }
6549 
6550 static struct got_object_id *
6551 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
6552     int lineno)
6553 {
6554 	struct tog_blame_line *line;
6555 
6556 	if (nlines <= 0 || lineno >= nlines)
6557 		return NULL;
6558 
6559 	line = &lines[lineno - 1];
6560 	if (!line->annotated)
6561 		return NULL;
6562 
6563 	return line->id;
6564 }
6565 
6566 static const struct got_error *
6567 stop_blame(struct tog_blame *blame)
6568 {
6569 	const struct got_error *err = NULL;
6570 	int i;
6571 
6572 	if (blame->thread) {
6573 		int errcode;
6574 		errcode = pthread_mutex_unlock(&tog_mutex);
6575 		if (errcode)
6576 			return got_error_set_errno(errcode,
6577 			    "pthread_mutex_unlock");
6578 		errcode = pthread_join(blame->thread, (void **)&err);
6579 		if (errcode)
6580 			return got_error_set_errno(errcode, "pthread_join");
6581 		errcode = pthread_mutex_lock(&tog_mutex);
6582 		if (errcode)
6583 			return got_error_set_errno(errcode,
6584 			    "pthread_mutex_lock");
6585 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
6586 			err = NULL;
6587 		blame->thread = 0; //NULL;
6588 	}
6589 	if (blame->thread_args.repo) {
6590 		const struct got_error *close_err;
6591 		close_err = got_repo_close(blame->thread_args.repo);
6592 		if (err == NULL)
6593 			err = close_err;
6594 		blame->thread_args.repo = NULL;
6595 	}
6596 	if (blame->f) {
6597 		if (fclose(blame->f) == EOF && err == NULL)
6598 			err = got_error_from_errno("fclose");
6599 		blame->f = NULL;
6600 	}
6601 	if (blame->lines) {
6602 		for (i = 0; i < blame->nlines; i++)
6603 			free(blame->lines[i].id);
6604 		free(blame->lines);
6605 		blame->lines = NULL;
6606 	}
6607 	free(blame->cb_args.commit_id);
6608 	blame->cb_args.commit_id = NULL;
6609 	if (blame->pack_fds) {
6610 		const struct got_error *pack_err =
6611 		    got_repo_pack_fds_close(blame->pack_fds);
6612 		if (err == NULL)
6613 			err = pack_err;
6614 		blame->pack_fds = NULL;
6615 	}
6616 	free(blame->line_offsets);
6617 	blame->line_offsets = NULL;
6618 	return err;
6619 }
6620 
6621 static const struct got_error *
6622 cancel_blame_view(void *arg)
6623 {
6624 	const struct got_error *err = NULL;
6625 	int *done = arg;
6626 	int errcode;
6627 
6628 	errcode = pthread_mutex_lock(&tog_mutex);
6629 	if (errcode)
6630 		return got_error_set_errno(errcode,
6631 		    "pthread_mutex_unlock");
6632 
6633 	if (*done)
6634 		err = got_error(GOT_ERR_CANCELLED);
6635 
6636 	errcode = pthread_mutex_unlock(&tog_mutex);
6637 	if (errcode)
6638 		return got_error_set_errno(errcode,
6639 		    "pthread_mutex_lock");
6640 
6641 	return err;
6642 }
6643 
6644 static const struct got_error *
6645 run_blame(struct tog_view *view)
6646 {
6647 	struct tog_blame_view_state *s = &view->state.blame;
6648 	struct tog_blame *blame = &s->blame;
6649 	const struct got_error *err = NULL;
6650 	struct got_commit_object *commit = NULL;
6651 	struct got_blob_object *blob = NULL;
6652 	struct got_repository *thread_repo = NULL;
6653 	struct got_object_id *obj_id = NULL;
6654 	int obj_type, fd = -1;
6655 	int *pack_fds = NULL;
6656 
6657 	err = got_object_open_as_commit(&commit, s->repo,
6658 	    &s->blamed_commit->id);
6659 	if (err)
6660 		return err;
6661 
6662 	fd = got_opentempfd();
6663 	if (fd == -1) {
6664 		err = got_error_from_errno("got_opentempfd");
6665 		goto done;
6666 	}
6667 
6668 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
6669 	if (err)
6670 		goto done;
6671 
6672 	err = got_object_get_type(&obj_type, s->repo, obj_id);
6673 	if (err)
6674 		goto done;
6675 
6676 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
6677 		err = got_error(GOT_ERR_OBJ_TYPE);
6678 		goto done;
6679 	}
6680 
6681 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
6682 	if (err)
6683 		goto done;
6684 	blame->f = got_opentemp();
6685 	if (blame->f == NULL) {
6686 		err = got_error_from_errno("got_opentemp");
6687 		goto done;
6688 	}
6689 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
6690 	    &blame->line_offsets, blame->f, blob);
6691 	if (err)
6692 		goto done;
6693 	if (blame->nlines == 0) {
6694 		s->blame_complete = 1;
6695 		goto done;
6696 	}
6697 
6698 	/* Don't include \n at EOF in the blame line count. */
6699 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
6700 		blame->nlines--;
6701 
6702 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
6703 	if (blame->lines == NULL) {
6704 		err = got_error_from_errno("calloc");
6705 		goto done;
6706 	}
6707 
6708 	err = got_repo_pack_fds_open(&pack_fds);
6709 	if (err)
6710 		goto done;
6711 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
6712 	    pack_fds);
6713 	if (err)
6714 		goto done;
6715 
6716 	blame->pack_fds = pack_fds;
6717 	blame->cb_args.view = view;
6718 	blame->cb_args.lines = blame->lines;
6719 	blame->cb_args.nlines = blame->nlines;
6720 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
6721 	if (blame->cb_args.commit_id == NULL) {
6722 		err = got_error_from_errno("got_object_id_dup");
6723 		goto done;
6724 	}
6725 	blame->cb_args.quit = &s->done;
6726 
6727 	blame->thread_args.path = s->path;
6728 	blame->thread_args.repo = thread_repo;
6729 	blame->thread_args.cb_args = &blame->cb_args;
6730 	blame->thread_args.complete = &s->blame_complete;
6731 	blame->thread_args.cancel_cb = cancel_blame_view;
6732 	blame->thread_args.cancel_arg = &s->done;
6733 	s->blame_complete = 0;
6734 
6735 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
6736 		s->first_displayed_line = 1;
6737 		s->last_displayed_line = view->nlines;
6738 		s->selected_line = 1;
6739 	}
6740 	s->matched_line = 0;
6741 
6742 done:
6743 	if (commit)
6744 		got_object_commit_close(commit);
6745 	if (fd != -1 && close(fd) == -1 && err == NULL)
6746 		err = got_error_from_errno("close");
6747 	if (blob)
6748 		got_object_blob_close(blob);
6749 	free(obj_id);
6750 	if (err)
6751 		stop_blame(blame);
6752 	return err;
6753 }
6754 
6755 static const struct got_error *
6756 open_blame_view(struct tog_view *view, char *path,
6757     struct got_object_id *commit_id, struct got_repository *repo)
6758 {
6759 	const struct got_error *err = NULL;
6760 	struct tog_blame_view_state *s = &view->state.blame;
6761 
6762 	STAILQ_INIT(&s->blamed_commits);
6763 
6764 	s->path = strdup(path);
6765 	if (s->path == NULL)
6766 		return got_error_from_errno("strdup");
6767 
6768 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
6769 	if (err) {
6770 		free(s->path);
6771 		return err;
6772 	}
6773 
6774 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
6775 	s->first_displayed_line = 1;
6776 	s->last_displayed_line = view->nlines;
6777 	s->selected_line = 1;
6778 	s->blame_complete = 0;
6779 	s->repo = repo;
6780 	s->commit_id = commit_id;
6781 	memset(&s->blame, 0, sizeof(s->blame));
6782 
6783 	STAILQ_INIT(&s->colors);
6784 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6785 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
6786 		    get_color_value("TOG_COLOR_COMMIT"));
6787 		if (err)
6788 			return err;
6789 	}
6790 
6791 	view->show = show_blame_view;
6792 	view->input = input_blame_view;
6793 	view->reset = reset_blame_view;
6794 	view->close = close_blame_view;
6795 	view->search_start = search_start_blame_view;
6796 	view->search_setup = search_setup_blame_view;
6797 	view->search_next = search_next_view_match;
6798 
6799 	if (using_mock_io) {
6800 		struct tog_blame_thread_args *bta = &s->blame.thread_args;
6801 		int rc;
6802 
6803 		rc = pthread_cond_init(&bta->blame_complete, NULL);
6804 		if (rc)
6805 			return got_error_set_errno(rc, "pthread_cond_init");
6806 	}
6807 
6808 	return run_blame(view);
6809 }
6810 
6811 static const struct got_error *
6812 close_blame_view(struct tog_view *view)
6813 {
6814 	const struct got_error *err = NULL;
6815 	struct tog_blame_view_state *s = &view->state.blame;
6816 
6817 	if (s->blame.thread)
6818 		err = stop_blame(&s->blame);
6819 
6820 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
6821 		struct got_object_qid *blamed_commit;
6822 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
6823 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6824 		got_object_qid_free(blamed_commit);
6825 	}
6826 
6827 	if (using_mock_io) {
6828 		struct tog_blame_thread_args *bta = &s->blame.thread_args;
6829 		int rc;
6830 
6831 		rc = pthread_cond_destroy(&bta->blame_complete);
6832 		if (rc && err == NULL)
6833 			err = got_error_set_errno(rc, "pthread_cond_destroy");
6834 	}
6835 
6836 	free(s->path);
6837 	free_colors(&s->colors);
6838 	return err;
6839 }
6840 
6841 static const struct got_error *
6842 search_start_blame_view(struct tog_view *view)
6843 {
6844 	struct tog_blame_view_state *s = &view->state.blame;
6845 
6846 	s->matched_line = 0;
6847 	return NULL;
6848 }
6849 
6850 static void
6851 search_setup_blame_view(struct tog_view *view, FILE **f, off_t **line_offsets,
6852     size_t *nlines, int **first, int **last, int **match, int **selected)
6853 {
6854 	struct tog_blame_view_state *s = &view->state.blame;
6855 
6856 	*f = s->blame.f;
6857 	*nlines = s->blame.nlines;
6858 	*line_offsets = s->blame.line_offsets;
6859 	*match = &s->matched_line;
6860 	*first = &s->first_displayed_line;
6861 	*last = &s->last_displayed_line;
6862 	*selected = &s->selected_line;
6863 }
6864 
6865 static const struct got_error *
6866 show_blame_view(struct tog_view *view)
6867 {
6868 	const struct got_error *err = NULL;
6869 	struct tog_blame_view_state *s = &view->state.blame;
6870 	int errcode;
6871 
6872 	if (s->blame.thread == 0 && !s->blame_complete) {
6873 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
6874 		    &s->blame.thread_args);
6875 		if (errcode)
6876 			return got_error_set_errno(errcode, "pthread_create");
6877 
6878 		if (!using_mock_io)
6879 			halfdelay(1); /* fast refresh while annotating  */
6880 	}
6881 
6882 	if (s->blame_complete && !using_mock_io)
6883 		halfdelay(10); /* disable fast refresh */
6884 
6885 	err = draw_blame(view);
6886 
6887 	view_border(view);
6888 	return err;
6889 }
6890 
6891 static const struct got_error *
6892 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
6893     struct got_repository *repo, struct got_object_id *id)
6894 {
6895 	struct tog_view		*log_view;
6896 	const struct got_error	*err = NULL;
6897 
6898 	*new_view = NULL;
6899 
6900 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6901 	if (log_view == NULL)
6902 		return got_error_from_errno("view_open");
6903 
6904 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0, NULL);
6905 	if (err)
6906 		view_close(log_view);
6907 	else
6908 		*new_view = log_view;
6909 
6910 	return err;
6911 }
6912 
6913 static const struct got_error *
6914 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
6915 {
6916 	const struct got_error *err = NULL, *thread_err = NULL;
6917 	struct tog_view *diff_view;
6918 	struct tog_blame_view_state *s = &view->state.blame;
6919 	int eos, nscroll, begin_y = 0, begin_x = 0;
6920 
6921 	eos = nscroll = view->nlines - 2;
6922 	if (view_is_hsplit_top(view))
6923 		--eos;  /* border */
6924 
6925 	switch (ch) {
6926 	case '0':
6927 	case '$':
6928 	case KEY_RIGHT:
6929 	case 'l':
6930 	case KEY_LEFT:
6931 	case 'h':
6932 		horizontal_scroll_input(view, ch);
6933 		break;
6934 	case 'q':
6935 		s->done = 1;
6936 		break;
6937 	case 'g':
6938 	case KEY_HOME:
6939 		s->selected_line = 1;
6940 		s->first_displayed_line = 1;
6941 		view->count = 0;
6942 		break;
6943 	case 'G':
6944 	case KEY_END:
6945 		if (s->blame.nlines < eos) {
6946 			s->selected_line = s->blame.nlines;
6947 			s->first_displayed_line = 1;
6948 		} else {
6949 			s->selected_line = eos;
6950 			s->first_displayed_line = s->blame.nlines - (eos - 1);
6951 		}
6952 		view->count = 0;
6953 		break;
6954 	case 'k':
6955 	case KEY_UP:
6956 	case CTRL('p'):
6957 		if (s->selected_line > 1)
6958 			s->selected_line--;
6959 		else if (s->selected_line == 1 &&
6960 		    s->first_displayed_line > 1)
6961 			s->first_displayed_line--;
6962 		else
6963 			view->count = 0;
6964 		break;
6965 	case CTRL('u'):
6966 	case 'u':
6967 		nscroll /= 2;
6968 		/* FALL THROUGH */
6969 	case KEY_PPAGE:
6970 	case CTRL('b'):
6971 	case 'b':
6972 		if (s->first_displayed_line == 1) {
6973 			if (view->count > 1)
6974 				nscroll += nscroll;
6975 			s->selected_line = MAX(1, s->selected_line - nscroll);
6976 			view->count = 0;
6977 			break;
6978 		}
6979 		if (s->first_displayed_line > nscroll)
6980 			s->first_displayed_line -= nscroll;
6981 		else
6982 			s->first_displayed_line = 1;
6983 		break;
6984 	case 'j':
6985 	case KEY_DOWN:
6986 	case CTRL('n'):
6987 		if (s->selected_line < eos && s->first_displayed_line +
6988 		    s->selected_line <= s->blame.nlines)
6989 			s->selected_line++;
6990 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
6991 			s->first_displayed_line++;
6992 		else
6993 			view->count = 0;
6994 		break;
6995 	case 'c':
6996 	case 'p': {
6997 		struct got_object_id *id = NULL;
6998 
6999 		view->count = 0;
7000 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
7001 		    s->first_displayed_line, s->selected_line);
7002 		if (id == NULL)
7003 			break;
7004 		if (ch == 'p') {
7005 			struct got_commit_object *commit, *pcommit;
7006 			struct got_object_qid *pid;
7007 			struct got_object_id *blob_id = NULL;
7008 			int obj_type;
7009 			err = got_object_open_as_commit(&commit,
7010 			    s->repo, id);
7011 			if (err)
7012 				break;
7013 			pid = STAILQ_FIRST(
7014 			    got_object_commit_get_parent_ids(commit));
7015 			if (pid == NULL) {
7016 				got_object_commit_close(commit);
7017 				break;
7018 			}
7019 			/* Check if path history ends here. */
7020 			err = got_object_open_as_commit(&pcommit,
7021 			    s->repo, &pid->id);
7022 			if (err)
7023 				break;
7024 			err = got_object_id_by_path(&blob_id, s->repo,
7025 			    pcommit, s->path);
7026 			got_object_commit_close(pcommit);
7027 			if (err) {
7028 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
7029 					err = NULL;
7030 				got_object_commit_close(commit);
7031 				break;
7032 			}
7033 			err = got_object_get_type(&obj_type, s->repo,
7034 			    blob_id);
7035 			free(blob_id);
7036 			/* Can't blame non-blob type objects. */
7037 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
7038 				got_object_commit_close(commit);
7039 				break;
7040 			}
7041 			err = got_object_qid_alloc(&s->blamed_commit,
7042 			    &pid->id);
7043 			got_object_commit_close(commit);
7044 		} else {
7045 			if (got_object_id_cmp(id,
7046 			    &s->blamed_commit->id) == 0)
7047 				break;
7048 			err = got_object_qid_alloc(&s->blamed_commit,
7049 			    id);
7050 		}
7051 		if (err)
7052 			break;
7053 		s->done = 1;
7054 		thread_err = stop_blame(&s->blame);
7055 		s->done = 0;
7056 		if (thread_err)
7057 			break;
7058 		STAILQ_INSERT_HEAD(&s->blamed_commits,
7059 		    s->blamed_commit, entry);
7060 		err = run_blame(view);
7061 		if (err)
7062 			break;
7063 		break;
7064 	}
7065 	case 'C': {
7066 		struct got_object_qid *first;
7067 
7068 		view->count = 0;
7069 		first = STAILQ_FIRST(&s->blamed_commits);
7070 		if (!got_object_id_cmp(&first->id, s->commit_id))
7071 			break;
7072 		s->done = 1;
7073 		thread_err = stop_blame(&s->blame);
7074 		s->done = 0;
7075 		if (thread_err)
7076 			break;
7077 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
7078 		got_object_qid_free(s->blamed_commit);
7079 		s->blamed_commit =
7080 		    STAILQ_FIRST(&s->blamed_commits);
7081 		err = run_blame(view);
7082 		if (err)
7083 			break;
7084 		break;
7085 	}
7086 	case 'L':
7087 		view->count = 0;
7088 		s->id_to_log = get_selected_commit_id(s->blame.lines,
7089 		    s->blame.nlines, s->first_displayed_line, s->selected_line);
7090 		if (s->id_to_log)
7091 			err = view_request_new(new_view, view, TOG_VIEW_LOG);
7092 		break;
7093 	case KEY_ENTER:
7094 	case '\r': {
7095 		struct got_object_id *id = NULL;
7096 		struct got_object_qid *pid;
7097 		struct got_commit_object *commit = NULL;
7098 
7099 		view->count = 0;
7100 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
7101 		    s->first_displayed_line, s->selected_line);
7102 		if (id == NULL)
7103 			break;
7104 		err = got_object_open_as_commit(&commit, s->repo, id);
7105 		if (err)
7106 			break;
7107 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
7108 		if (*new_view) {
7109 			/* traversed from diff view, release diff resources  */
7110 			err = close_diff_view(*new_view);
7111 			if (err)
7112 				break;
7113 			diff_view = *new_view;
7114 		} else {
7115 			if (view_is_parent_view(view))
7116 				view_get_split(view, &begin_y, &begin_x);
7117 
7118 			diff_view = view_open(0, 0, begin_y, begin_x,
7119 			    TOG_VIEW_DIFF);
7120 			if (diff_view == NULL) {
7121 				got_object_commit_close(commit);
7122 				err = got_error_from_errno("view_open");
7123 				break;
7124 			}
7125 		}
7126 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
7127 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
7128 		got_object_commit_close(commit);
7129 		if (err)
7130 			break;
7131 		s->last_diffed_line = s->first_displayed_line - 1 +
7132 		    s->selected_line;
7133 		if (*new_view)
7134 			break;	/* still open from active diff view */
7135 		if (view_is_parent_view(view) &&
7136 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
7137 			err = view_init_hsplit(view, begin_y);
7138 			if (err)
7139 				break;
7140 		}
7141 
7142 		view->focussed = 0;
7143 		diff_view->focussed = 1;
7144 		diff_view->mode = view->mode;
7145 		diff_view->nlines = view->lines - begin_y;
7146 		if (view_is_parent_view(view)) {
7147 			view_transfer_size(diff_view, view);
7148 			err = view_close_child(view);
7149 			if (err)
7150 				break;
7151 			err = view_set_child(view, diff_view);
7152 			if (err)
7153 				break;
7154 			view->focus_child = 1;
7155 		} else
7156 			*new_view = diff_view;
7157 		if (err)
7158 			break;
7159 		break;
7160 	}
7161 	case CTRL('d'):
7162 	case 'd':
7163 		nscroll /= 2;
7164 		/* FALL THROUGH */
7165 	case KEY_NPAGE:
7166 	case CTRL('f'):
7167 	case 'f':
7168 	case ' ':
7169 		if (s->last_displayed_line >= s->blame.nlines &&
7170 		    s->selected_line >= MIN(s->blame.nlines,
7171 		    view->nlines - 2)) {
7172 			view->count = 0;
7173 			break;
7174 		}
7175 		if (s->last_displayed_line >= s->blame.nlines &&
7176 		    s->selected_line < view->nlines - 2) {
7177 			s->selected_line +=
7178 			    MIN(nscroll, s->last_displayed_line -
7179 			    s->first_displayed_line - s->selected_line + 1);
7180 		}
7181 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
7182 			s->first_displayed_line += nscroll;
7183 		else
7184 			s->first_displayed_line =
7185 			    s->blame.nlines - (view->nlines - 3);
7186 		break;
7187 	case KEY_RESIZE:
7188 		if (s->selected_line > view->nlines - 2) {
7189 			s->selected_line = MIN(s->blame.nlines,
7190 			    view->nlines - 2);
7191 		}
7192 		break;
7193 	default:
7194 		view->count = 0;
7195 		break;
7196 	}
7197 	return thread_err ? thread_err : err;
7198 }
7199 
7200 static const struct got_error *
7201 reset_blame_view(struct tog_view *view)
7202 {
7203 	const struct got_error *err;
7204 	struct tog_blame_view_state *s = &view->state.blame;
7205 
7206 	view->count = 0;
7207 	s->done = 1;
7208 	err = stop_blame(&s->blame);
7209 	s->done = 0;
7210 	if (err)
7211 		return err;
7212 	return run_blame(view);
7213 }
7214 
7215 static const struct got_error *
7216 cmd_blame(int argc, char *argv[])
7217 {
7218 	const struct got_error *error;
7219 	struct got_repository *repo = NULL;
7220 	struct got_worktree *worktree = NULL;
7221 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7222 	char *link_target = NULL;
7223 	struct got_object_id *commit_id = NULL;
7224 	struct got_commit_object *commit = NULL;
7225 	char *keyword_idstr = NULL, *commit_id_str = NULL;
7226 	int ch;
7227 	struct tog_view *view = NULL;
7228 	int *pack_fds = NULL;
7229 
7230 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7231 		switch (ch) {
7232 		case 'c':
7233 			commit_id_str = optarg;
7234 			break;
7235 		case 'r':
7236 			repo_path = realpath(optarg, NULL);
7237 			if (repo_path == NULL)
7238 				return got_error_from_errno2("realpath",
7239 				    optarg);
7240 			break;
7241 		default:
7242 			usage_blame();
7243 			/* NOTREACHED */
7244 		}
7245 	}
7246 
7247 	argc -= optind;
7248 	argv += optind;
7249 
7250 	if (argc != 1)
7251 		usage_blame();
7252 
7253 	error = got_repo_pack_fds_open(&pack_fds);
7254 	if (error != NULL)
7255 		goto done;
7256 
7257 	if (repo_path == NULL) {
7258 		cwd = getcwd(NULL, 0);
7259 		if (cwd == NULL)
7260 			return got_error_from_errno("getcwd");
7261 		error = got_worktree_open(&worktree, cwd, NULL);
7262 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7263 			goto done;
7264 		if (worktree)
7265 			repo_path =
7266 			    strdup(got_worktree_get_repo_path(worktree));
7267 		else
7268 			repo_path = strdup(cwd);
7269 		if (repo_path == NULL) {
7270 			error = got_error_from_errno("strdup");
7271 			goto done;
7272 		}
7273 	}
7274 
7275 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7276 	if (error != NULL)
7277 		goto done;
7278 
7279 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
7280 	    worktree);
7281 	if (error)
7282 		goto done;
7283 
7284 	init_curses();
7285 
7286 	error = apply_unveil(got_repo_get_path(repo), NULL);
7287 	if (error)
7288 		goto done;
7289 
7290 	error = tog_load_refs(repo, 0);
7291 	if (error)
7292 		goto done;
7293 
7294 	if (commit_id_str == NULL) {
7295 		struct got_reference *head_ref;
7296 		error = got_ref_open(&head_ref, repo, worktree ?
7297 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
7298 		if (error != NULL)
7299 			goto done;
7300 		error = got_ref_resolve(&commit_id, repo, head_ref);
7301 		got_ref_close(head_ref);
7302 	} else {
7303 		error = got_keyword_to_idstr(&keyword_idstr, commit_id_str,
7304 		    repo, worktree);
7305 		if (error != NULL)
7306 			goto done;
7307 		if (keyword_idstr != NULL)
7308 			commit_id_str = keyword_idstr;
7309 
7310 		error = got_repo_match_object_id(&commit_id, NULL,
7311 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7312 	}
7313 	if (error != NULL)
7314 		goto done;
7315 
7316 	error = got_object_open_as_commit(&commit, repo, commit_id);
7317 	if (error)
7318 		goto done;
7319 
7320 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
7321 	    commit, repo);
7322 	if (error)
7323 		goto done;
7324 
7325 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
7326 	if (view == NULL) {
7327 		error = got_error_from_errno("view_open");
7328 		goto done;
7329 	}
7330 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
7331 	    commit_id, repo);
7332 	if (error != NULL) {
7333 		if (view->close == NULL)
7334 			close_blame_view(view);
7335 		view_close(view);
7336 		goto done;
7337 	}
7338 
7339 	if (worktree) {
7340 		error = set_tog_base_commit(repo, worktree);
7341 		if (error != NULL)
7342 			goto done;
7343 
7344 		/* Release work tree lock. */
7345 		got_worktree_close(worktree);
7346 		worktree = NULL;
7347 	}
7348 
7349 	error = view_loop(view);
7350 
7351 done:
7352 	free(tog_base_commit.id);
7353 	free(repo_path);
7354 	free(in_repo_path);
7355 	free(link_target);
7356 	free(cwd);
7357 	free(commit_id);
7358 	free(keyword_idstr);
7359 	if (commit)
7360 		got_object_commit_close(commit);
7361 	if (worktree)
7362 		got_worktree_close(worktree);
7363 	if (repo) {
7364 		const struct got_error *close_err = got_repo_close(repo);
7365 		if (error == NULL)
7366 			error = close_err;
7367 	}
7368 	if (pack_fds) {
7369 		const struct got_error *pack_err =
7370 		    got_repo_pack_fds_close(pack_fds);
7371 		if (error == NULL)
7372 			error = pack_err;
7373 	}
7374 	tog_free_refs();
7375 	return error;
7376 }
7377 
7378 static const struct got_error *
7379 draw_tree_entries(struct tog_view *view, const char *parent_path)
7380 {
7381 	struct tog_tree_view_state *s = &view->state.tree;
7382 	const struct got_error *err = NULL;
7383 	struct got_tree_entry *te;
7384 	wchar_t *wline;
7385 	char *index = NULL;
7386 	struct tog_color *tc;
7387 	int width, n, nentries, scrollx, i = 1;
7388 	int limit = view->nlines;
7389 
7390 	s->ndisplayed = 0;
7391 	if (view_is_hsplit_top(view))
7392 		--limit;  /* border */
7393 
7394 	werase(view->window);
7395 
7396 	if (limit == 0)
7397 		return NULL;
7398 
7399 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
7400 	    0, 0);
7401 	if (err)
7402 		return err;
7403 	if (view_needs_focus_indication(view))
7404 		wstandout(view->window);
7405 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
7406 	if (tc)
7407 		wattr_on(view->window, COLOR_PAIR(tc->colorpair), NULL);
7408 	waddwstr(view->window, wline);
7409 	free(wline);
7410 	wline = NULL;
7411 	while (width++ < view->ncols)
7412 		waddch(view->window, ' ');
7413 	if (tc)
7414 		wattr_off(view->window, COLOR_PAIR(tc->colorpair), NULL);
7415 	if (view_needs_focus_indication(view))
7416 		wstandend(view->window);
7417 	if (--limit <= 0)
7418 		return NULL;
7419 
7420 	i += s->selected;
7421 	if (s->first_displayed_entry) {
7422 		i += got_tree_entry_get_index(s->first_displayed_entry);
7423 		if (s->tree != s->root)
7424 			++i;  /* account for ".." entry */
7425 	}
7426 	nentries = got_object_tree_get_nentries(s->tree);
7427 	if (asprintf(&index, "[%d/%d] %s",
7428 	    i, nentries + (s->tree == s->root ? 0 : 1), parent_path) == -1)
7429 		return got_error_from_errno("asprintf");
7430 	err = format_line(&wline, &width, NULL, index, 0, view->ncols, 0, 0);
7431 	free(index);
7432 	if (err)
7433 		return err;
7434 	waddwstr(view->window, wline);
7435 	free(wline);
7436 	wline = NULL;
7437 	if (width < view->ncols - 1)
7438 		waddch(view->window, '\n');
7439 	if (--limit <= 0)
7440 		return NULL;
7441 	waddch(view->window, '\n');
7442 	if (--limit <= 0)
7443 		return NULL;
7444 
7445 	if (s->first_displayed_entry == NULL) {
7446 		te = got_object_tree_get_first_entry(s->tree);
7447 		if (s->selected == 0) {
7448 			if (view->focussed)
7449 				wstandout(view->window);
7450 			s->selected_entry = NULL;
7451 		}
7452 		waddstr(view->window, "  ..\n");	/* parent directory */
7453 		if (s->selected == 0 && view->focussed)
7454 			wstandend(view->window);
7455 		s->ndisplayed++;
7456 		if (--limit <= 0)
7457 			return NULL;
7458 		n = 1;
7459 	} else {
7460 		n = 0;
7461 		te = s->first_displayed_entry;
7462 	}
7463 
7464 	view->maxx = 0;
7465 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
7466 		char *line = NULL, *id_str = NULL, *link_target = NULL;
7467 		const char *modestr = "";
7468 		mode_t mode;
7469 
7470 		te = got_object_tree_get_entry(s->tree, i);
7471 		mode = got_tree_entry_get_mode(te);
7472 
7473 		if (s->show_ids) {
7474 			err = got_object_id_str(&id_str,
7475 			    got_tree_entry_get_id(te));
7476 			if (err)
7477 				return got_error_from_errno(
7478 				    "got_object_id_str");
7479 		}
7480 		if (got_object_tree_entry_is_submodule(te))
7481 			modestr = "$";
7482 		else if (S_ISLNK(mode)) {
7483 			int i;
7484 
7485 			err = got_tree_entry_get_symlink_target(&link_target,
7486 			    te, s->repo);
7487 			if (err) {
7488 				free(id_str);
7489 				return err;
7490 			}
7491 			for (i = 0; link_target[i] != '\0'; i++) {
7492 				if (!isprint((unsigned char)link_target[i]))
7493 					link_target[i] = '?';
7494 			}
7495 			modestr = "@";
7496 		}
7497 		else if (S_ISDIR(mode))
7498 			modestr = "/";
7499 		else if (mode & S_IXUSR)
7500 			modestr = "*";
7501 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
7502 		    got_tree_entry_get_name(te), modestr,
7503 		    link_target ? " -> ": "",
7504 		    link_target ? link_target : "") == -1) {
7505 			free(id_str);
7506 			free(link_target);
7507 			return got_error_from_errno("asprintf");
7508 		}
7509 		free(id_str);
7510 		free(link_target);
7511 
7512 		/* use full line width to determine view->maxx */
7513 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0, 0);
7514 		if (err) {
7515 			free(line);
7516 			break;
7517 		}
7518 		view->maxx = MAX(view->maxx, width);
7519 		free(wline);
7520 		wline = NULL;
7521 
7522 		err = format_line(&wline, &width, &scrollx, line, view->x,
7523 		    view->ncols, 0, 0);
7524 		if (err) {
7525 			free(line);
7526 			break;
7527 		}
7528 		if (n == s->selected) {
7529 			if (view->focussed)
7530 				wstandout(view->window);
7531 			s->selected_entry = te;
7532 		}
7533 		tc = match_color(&s->colors, line);
7534 		if (tc)
7535 			wattr_on(view->window,
7536 			    COLOR_PAIR(tc->colorpair), NULL);
7537 		waddwstr(view->window, &wline[scrollx]);
7538 		if (tc)
7539 			wattr_off(view->window,
7540 			    COLOR_PAIR(tc->colorpair), NULL);
7541 		if (width < view->ncols)
7542 			waddch(view->window, '\n');
7543 		if (n == s->selected && view->focussed)
7544 			wstandend(view->window);
7545 		free(line);
7546 		free(wline);
7547 		wline = NULL;
7548 		n++;
7549 		s->ndisplayed++;
7550 		s->last_displayed_entry = te;
7551 		if (--limit <= 0)
7552 			break;
7553 	}
7554 
7555 	return err;
7556 }
7557 
7558 static void
7559 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
7560 {
7561 	struct got_tree_entry *te;
7562 	int isroot = s->tree == s->root;
7563 	int i = 0;
7564 
7565 	if (s->first_displayed_entry == NULL)
7566 		return;
7567 
7568 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
7569 	while (i++ < maxscroll) {
7570 		if (te == NULL) {
7571 			if (!isroot)
7572 				s->first_displayed_entry = NULL;
7573 			break;
7574 		}
7575 		s->first_displayed_entry = te;
7576 		te = got_tree_entry_get_prev(s->tree, te);
7577 	}
7578 }
7579 
7580 static const struct got_error *
7581 tree_scroll_down(struct tog_view *view, int maxscroll)
7582 {
7583 	struct tog_tree_view_state *s = &view->state.tree;
7584 	struct got_tree_entry *next, *last;
7585 	int n = 0;
7586 
7587 	if (s->first_displayed_entry)
7588 		next = got_tree_entry_get_next(s->tree,
7589 		    s->first_displayed_entry);
7590 	else
7591 		next = got_object_tree_get_first_entry(s->tree);
7592 
7593 	last = s->last_displayed_entry;
7594 	while (next && n++ < maxscroll) {
7595 		if (last) {
7596 			s->last_displayed_entry = last;
7597 			last = got_tree_entry_get_next(s->tree, last);
7598 		}
7599 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
7600 			s->first_displayed_entry = next;
7601 			next = got_tree_entry_get_next(s->tree, next);
7602 		}
7603 	}
7604 
7605 	return NULL;
7606 }
7607 
7608 static const struct got_error *
7609 tree_entry_path(char **path, struct tog_parent_trees *parents,
7610     struct got_tree_entry *te)
7611 {
7612 	const struct got_error *err = NULL;
7613 	struct tog_parent_tree *pt;
7614 	size_t len = 2; /* for leading slash and NUL */
7615 
7616 	TAILQ_FOREACH(pt, parents, entry)
7617 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
7618 		    + 1 /* slash */;
7619 	if (te)
7620 		len += strlen(got_tree_entry_get_name(te));
7621 
7622 	*path = calloc(1, len);
7623 	if (path == NULL)
7624 		return got_error_from_errno("calloc");
7625 
7626 	(*path)[0] = '/';
7627 	pt = TAILQ_LAST(parents, tog_parent_trees);
7628 	while (pt) {
7629 		const char *name = got_tree_entry_get_name(pt->selected_entry);
7630 		if (strlcat(*path, name, len) >= len) {
7631 			err = got_error(GOT_ERR_NO_SPACE);
7632 			goto done;
7633 		}
7634 		if (strlcat(*path, "/", len) >= len) {
7635 			err = got_error(GOT_ERR_NO_SPACE);
7636 			goto done;
7637 		}
7638 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
7639 	}
7640 	if (te) {
7641 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
7642 			err = got_error(GOT_ERR_NO_SPACE);
7643 			goto done;
7644 		}
7645 	}
7646 done:
7647 	if (err) {
7648 		free(*path);
7649 		*path = NULL;
7650 	}
7651 	return err;
7652 }
7653 
7654 static const struct got_error *
7655 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
7656     struct got_tree_entry *te, struct tog_parent_trees *parents,
7657     struct got_object_id *commit_id, struct got_repository *repo)
7658 {
7659 	const struct got_error *err = NULL;
7660 	char *path;
7661 	struct tog_view *blame_view;
7662 
7663 	*new_view = NULL;
7664 
7665 	err = tree_entry_path(&path, parents, te);
7666 	if (err)
7667 		return err;
7668 
7669 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
7670 	if (blame_view == NULL) {
7671 		err = got_error_from_errno("view_open");
7672 		goto done;
7673 	}
7674 
7675 	err = open_blame_view(blame_view, path, commit_id, repo);
7676 	if (err) {
7677 		if (err->code == GOT_ERR_CANCELLED)
7678 			err = NULL;
7679 		view_close(blame_view);
7680 	} else
7681 		*new_view = blame_view;
7682 done:
7683 	free(path);
7684 	return err;
7685 }
7686 
7687 static const struct got_error *
7688 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
7689     struct tog_tree_view_state *s)
7690 {
7691 	struct tog_view *log_view;
7692 	const struct got_error *err = NULL;
7693 	char *path;
7694 
7695 	*new_view = NULL;
7696 
7697 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7698 	if (log_view == NULL)
7699 		return got_error_from_errno("view_open");
7700 
7701 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
7702 	if (err)
7703 		return err;
7704 
7705 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
7706 	    path, 0, NULL);
7707 	if (err)
7708 		view_close(log_view);
7709 	else
7710 		*new_view = log_view;
7711 	free(path);
7712 	return err;
7713 }
7714 
7715 static const struct got_error *
7716 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
7717     const char *head_ref_name, struct got_repository *repo)
7718 {
7719 	const struct got_error *err = NULL;
7720 	char *commit_id_str = NULL;
7721 	struct tog_tree_view_state *s = &view->state.tree;
7722 	struct got_commit_object *commit = NULL;
7723 
7724 	TAILQ_INIT(&s->parents);
7725 	STAILQ_INIT(&s->colors);
7726 
7727 	s->commit_id = got_object_id_dup(commit_id);
7728 	if (s->commit_id == NULL) {
7729 		err = got_error_from_errno("got_object_id_dup");
7730 		goto done;
7731 	}
7732 
7733 	err = got_object_open_as_commit(&commit, repo, commit_id);
7734 	if (err)
7735 		goto done;
7736 
7737 	/*
7738 	 * The root is opened here and will be closed when the view is closed.
7739 	 * Any visited subtrees and their path-wise parents are opened and
7740 	 * closed on demand.
7741 	 */
7742 	err = got_object_open_as_tree(&s->root, repo,
7743 	    got_object_commit_get_tree_id(commit));
7744 	if (err)
7745 		goto done;
7746 	s->tree = s->root;
7747 
7748 	err = got_object_id_str(&commit_id_str, commit_id);
7749 	if (err != NULL)
7750 		goto done;
7751 
7752 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
7753 		err = got_error_from_errno("asprintf");
7754 		goto done;
7755 	}
7756 
7757 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
7758 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
7759 	if (head_ref_name) {
7760 		s->head_ref_name = strdup(head_ref_name);
7761 		if (s->head_ref_name == NULL) {
7762 			err = got_error_from_errno("strdup");
7763 			goto done;
7764 		}
7765 	}
7766 	s->repo = repo;
7767 
7768 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7769 		err = add_color(&s->colors, "\\$$",
7770 		    TOG_COLOR_TREE_SUBMODULE,
7771 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
7772 		if (err)
7773 			goto done;
7774 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
7775 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
7776 		if (err)
7777 			goto done;
7778 		err = add_color(&s->colors, "/$",
7779 		    TOG_COLOR_TREE_DIRECTORY,
7780 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
7781 		if (err)
7782 			goto done;
7783 
7784 		err = add_color(&s->colors, "\\*$",
7785 		    TOG_COLOR_TREE_EXECUTABLE,
7786 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
7787 		if (err)
7788 			goto done;
7789 
7790 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
7791 		    get_color_value("TOG_COLOR_COMMIT"));
7792 		if (err)
7793 			goto done;
7794 	}
7795 
7796 	view->show = show_tree_view;
7797 	view->input = input_tree_view;
7798 	view->close = close_tree_view;
7799 	view->search_start = search_start_tree_view;
7800 	view->search_next = search_next_tree_view;
7801 done:
7802 	free(commit_id_str);
7803 	if (commit)
7804 		got_object_commit_close(commit);
7805 	if (err) {
7806 		if (view->close == NULL)
7807 			close_tree_view(view);
7808 		view_close(view);
7809 	}
7810 	return err;
7811 }
7812 
7813 static const struct got_error *
7814 close_tree_view(struct tog_view *view)
7815 {
7816 	struct tog_tree_view_state *s = &view->state.tree;
7817 
7818 	free_colors(&s->colors);
7819 	free(s->tree_label);
7820 	s->tree_label = NULL;
7821 	free(s->commit_id);
7822 	s->commit_id = NULL;
7823 	free(s->head_ref_name);
7824 	s->head_ref_name = NULL;
7825 	while (!TAILQ_EMPTY(&s->parents)) {
7826 		struct tog_parent_tree *parent;
7827 		parent = TAILQ_FIRST(&s->parents);
7828 		TAILQ_REMOVE(&s->parents, parent, entry);
7829 		if (parent->tree != s->root)
7830 			got_object_tree_close(parent->tree);
7831 		free(parent);
7832 
7833 	}
7834 	if (s->tree != NULL && s->tree != s->root)
7835 		got_object_tree_close(s->tree);
7836 	if (s->root)
7837 		got_object_tree_close(s->root);
7838 	return NULL;
7839 }
7840 
7841 static const struct got_error *
7842 search_start_tree_view(struct tog_view *view)
7843 {
7844 	struct tog_tree_view_state *s = &view->state.tree;
7845 
7846 	s->matched_entry = NULL;
7847 	return NULL;
7848 }
7849 
7850 static int
7851 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
7852 {
7853 	regmatch_t regmatch;
7854 
7855 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
7856 	    0) == 0;
7857 }
7858 
7859 static const struct got_error *
7860 search_next_tree_view(struct tog_view *view)
7861 {
7862 	struct tog_tree_view_state *s = &view->state.tree;
7863 	struct got_tree_entry *te = NULL;
7864 
7865 	if (!view->searching) {
7866 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7867 		return NULL;
7868 	}
7869 
7870 	if (s->matched_entry) {
7871 		if (view->searching == TOG_SEARCH_FORWARD) {
7872 			if (s->selected_entry)
7873 				te = got_tree_entry_get_next(s->tree,
7874 				    s->selected_entry);
7875 			else
7876 				te = got_object_tree_get_first_entry(s->tree);
7877 		} else {
7878 			if (s->selected_entry == NULL)
7879 				te = got_object_tree_get_last_entry(s->tree);
7880 			else
7881 				te = got_tree_entry_get_prev(s->tree,
7882 				    s->selected_entry);
7883 		}
7884 	} else {
7885 		if (s->selected_entry)
7886 			te = s->selected_entry;
7887 		else if (view->searching == TOG_SEARCH_FORWARD)
7888 			te = got_object_tree_get_first_entry(s->tree);
7889 		else
7890 			te = got_object_tree_get_last_entry(s->tree);
7891 	}
7892 
7893 	while (1) {
7894 		if (te == NULL) {
7895 			if (s->matched_entry == NULL) {
7896 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7897 				return NULL;
7898 			}
7899 			if (view->searching == TOG_SEARCH_FORWARD)
7900 				te = got_object_tree_get_first_entry(s->tree);
7901 			else
7902 				te = got_object_tree_get_last_entry(s->tree);
7903 		}
7904 
7905 		if (match_tree_entry(te, &view->regex)) {
7906 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7907 			s->matched_entry = te;
7908 			break;
7909 		}
7910 
7911 		if (view->searching == TOG_SEARCH_FORWARD)
7912 			te = got_tree_entry_get_next(s->tree, te);
7913 		else
7914 			te = got_tree_entry_get_prev(s->tree, te);
7915 	}
7916 
7917 	if (s->matched_entry) {
7918 		s->first_displayed_entry = s->matched_entry;
7919 		s->selected = 0;
7920 	}
7921 
7922 	return NULL;
7923 }
7924 
7925 static const struct got_error *
7926 show_tree_view(struct tog_view *view)
7927 {
7928 	const struct got_error *err = NULL;
7929 	struct tog_tree_view_state *s = &view->state.tree;
7930 	char *parent_path;
7931 
7932 	err = tree_entry_path(&parent_path, &s->parents, NULL);
7933 	if (err)
7934 		return err;
7935 
7936 	err = draw_tree_entries(view, parent_path);
7937 	free(parent_path);
7938 
7939 	view_border(view);
7940 	return err;
7941 }
7942 
7943 static const struct got_error *
7944 tree_goto_line(struct tog_view *view, int nlines)
7945 {
7946 	const struct got_error		 *err = NULL;
7947 	struct tog_tree_view_state	 *s = &view->state.tree;
7948 	struct got_tree_entry		**fte, **lte, **ste;
7949 	int				  g, last, first = 1, i = 1;
7950 	int				  root = s->tree == s->root;
7951 	int				  off = root ? 1 : 2;
7952 
7953 	g = view->gline;
7954 	view->gline = 0;
7955 
7956 	if (g == 0)
7957 		g = 1;
7958 	else if (g > got_object_tree_get_nentries(s->tree))
7959 		g = got_object_tree_get_nentries(s->tree) + (root ? 0 : 1);
7960 
7961 	fte = &s->first_displayed_entry;
7962 	lte = &s->last_displayed_entry;
7963 	ste = &s->selected_entry;
7964 
7965 	if (*fte != NULL) {
7966 		first = got_tree_entry_get_index(*fte);
7967 		first += off;  /* account for ".." */
7968 	}
7969 	last = got_tree_entry_get_index(*lte);
7970 	last += off;
7971 
7972 	if (g >= first && g <= last && g - first < nlines) {
7973 		s->selected = g - first;
7974 		return NULL;	/* gline is on the current page */
7975 	}
7976 
7977 	if (*ste != NULL) {
7978 		i = got_tree_entry_get_index(*ste);
7979 		i += off;
7980 	}
7981 
7982 	if (i < g) {
7983 		err = tree_scroll_down(view, g - i);
7984 		if (err)
7985 			return err;
7986 		if (got_tree_entry_get_index(*lte) >=
7987 		    got_object_tree_get_nentries(s->tree) - 1 &&
7988 		    first + s->selected < g &&
7989 		    s->selected < s->ndisplayed - 1) {
7990 			first = got_tree_entry_get_index(*fte);
7991 			first += off;
7992 			s->selected = g - first;
7993 		}
7994 	} else if (i > g)
7995 		tree_scroll_up(s, i - g);
7996 
7997 	if (g < nlines &&
7998 	    (*fte == NULL || (root && !got_tree_entry_get_index(*fte))))
7999 		s->selected = g - 1;
8000 
8001 	return NULL;
8002 }
8003 
8004 static const struct got_error *
8005 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
8006 {
8007 	const struct got_error *err = NULL;
8008 	struct tog_tree_view_state *s = &view->state.tree;
8009 	struct got_tree_entry *te;
8010 	int n, nscroll = view->nlines - 3;
8011 
8012 	if (view->gline)
8013 		return tree_goto_line(view, nscroll);
8014 
8015 	switch (ch) {
8016 	case '0':
8017 	case '$':
8018 	case KEY_RIGHT:
8019 	case 'l':
8020 	case KEY_LEFT:
8021 	case 'h':
8022 		horizontal_scroll_input(view, ch);
8023 		break;
8024 	case 'i':
8025 		s->show_ids = !s->show_ids;
8026 		view->count = 0;
8027 		break;
8028 	case 'L':
8029 		view->count = 0;
8030 		if (!s->selected_entry)
8031 			break;
8032 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
8033 		break;
8034 	case 'R':
8035 		view->count = 0;
8036 		err = view_request_new(new_view, view, TOG_VIEW_REF);
8037 		break;
8038 	case 'g':
8039 	case '=':
8040 	case KEY_HOME:
8041 		s->selected = 0;
8042 		view->count = 0;
8043 		if (s->tree == s->root)
8044 			s->first_displayed_entry =
8045 			    got_object_tree_get_first_entry(s->tree);
8046 		else
8047 			s->first_displayed_entry = NULL;
8048 		break;
8049 	case 'G':
8050 	case '*':
8051 	case KEY_END: {
8052 		int eos = view->nlines - 3;
8053 
8054 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
8055 			--eos;  /* border */
8056 		s->selected = 0;
8057 		view->count = 0;
8058 		te = got_object_tree_get_last_entry(s->tree);
8059 		for (n = 0; n < eos; n++) {
8060 			if (te == NULL) {
8061 				if (s->tree != s->root) {
8062 					s->first_displayed_entry = NULL;
8063 					n++;
8064 				}
8065 				break;
8066 			}
8067 			s->first_displayed_entry = te;
8068 			te = got_tree_entry_get_prev(s->tree, te);
8069 		}
8070 		if (n > 0)
8071 			s->selected = n - 1;
8072 		break;
8073 	}
8074 	case 'k':
8075 	case KEY_UP:
8076 	case CTRL('p'):
8077 		if (s->selected > 0) {
8078 			s->selected--;
8079 			break;
8080 		}
8081