Code

f56547455c50dcf170dbdb0f8424915a9db2c40e
[tig.git] / tig.c
1 /* Copyright (c) 2006-2010 Jonas Fonseca <fonseca@diku.dk>
2  *
3  * This program is free software; you can redistribute it and/or
4  * modify it under the terms of the GNU General Public License as
5  * published by the Free Software Foundation; either version 2 of
6  * the License, or (at your option) any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  */
14 #include "tig.h"
15 #include "io.h"
16 #include "graph.h"
18 static void __NORETURN die(const char *err, ...);
19 static void warn(const char *msg, ...);
20 static void report(const char *msg, ...);
23 struct ref {
24         char id[SIZEOF_REV];    /* Commit SHA1 ID */
25         unsigned int head:1;    /* Is it the current HEAD? */
26         unsigned int tag:1;     /* Is it a tag? */
27         unsigned int ltag:1;    /* If so, is the tag local? */
28         unsigned int remote:1;  /* Is it a remote ref? */
29         unsigned int tracked:1; /* Is it the remote for the current HEAD? */
30         char name[1];           /* Ref name; tag or head names are shortened. */
31 };
33 struct ref_list {
34         char id[SIZEOF_REV];    /* Commit SHA1 ID */
35         size_t size;            /* Number of refs. */
36         struct ref **refs;      /* References for this ID. */
37 };
39 static struct ref *get_ref_head();
40 static struct ref_list *get_ref_list(const char *id);
41 static void foreach_ref(bool (*visitor)(void *data, const struct ref *ref), void *data);
42 static int load_refs(void);
44 enum input_status {
45         INPUT_OK,
46         INPUT_SKIP,
47         INPUT_STOP,
48         INPUT_CANCEL
49 };
51 typedef enum input_status (*input_handler)(void *data, char *buf, int c);
53 static char *prompt_input(const char *prompt, input_handler handler, void *data);
54 static bool prompt_yesno(const char *prompt);
56 struct menu_item {
57         int hotkey;
58         const char *text;
59         void *data;
60 };
62 static bool prompt_menu(const char *prompt, const struct menu_item *items, int *selected);
64 enum graphic {
65         GRAPHIC_ASCII = 0,
66         GRAPHIC_DEFAULT,
67         GRAPHIC_UTF8
68 };
70 static const struct enum_map graphic_map[] = {
71 #define GRAPHIC_(name) ENUM_MAP(#name, GRAPHIC_##name)
72         GRAPHIC_(ASCII),
73         GRAPHIC_(DEFAULT),
74         GRAPHIC_(UTF8)
75 #undef  GRAPHIC_
76 };
78 #define DATE_INFO \
79         DATE_(NO), \
80         DATE_(DEFAULT), \
81         DATE_(LOCAL), \
82         DATE_(RELATIVE), \
83         DATE_(SHORT)
85 enum date {
86 #define DATE_(name) DATE_##name
87         DATE_INFO
88 #undef  DATE_
89 };
91 static const struct enum_map date_map[] = {
92 #define DATE_(name) ENUM_MAP(#name, DATE_##name)
93         DATE_INFO
94 #undef  DATE_
95 };
97 struct time {
98         time_t sec;
99         int tz;
100 };
102 static inline int timecmp(const struct time *t1, const struct time *t2)
104         return t1->sec - t2->sec;
107 static const char *
108 mkdate(const struct time *time, enum date date)
110         static char buf[DATE_COLS + 1];
111         static const struct enum_map reldate[] = {
112                 { "second", 1,                  60 * 2 },
113                 { "minute", 60,                 60 * 60 * 2 },
114                 { "hour",   60 * 60,            60 * 60 * 24 * 2 },
115                 { "day",    60 * 60 * 24,       60 * 60 * 24 * 7 * 2 },
116                 { "week",   60 * 60 * 24 * 7,   60 * 60 * 24 * 7 * 5 },
117                 { "month",  60 * 60 * 24 * 30,  60 * 60 * 24 * 30 * 12 },
118         };
119         struct tm tm;
121         if (!date || !time || !time->sec)
122                 return "";
124         if (date == DATE_RELATIVE) {
125                 struct timeval now;
126                 time_t date = time->sec + time->tz;
127                 time_t seconds;
128                 int i;
130                 gettimeofday(&now, NULL);
131                 seconds = now.tv_sec < date ? date - now.tv_sec : now.tv_sec - date;
132                 for (i = 0; i < ARRAY_SIZE(reldate); i++) {
133                         if (seconds >= reldate[i].value)
134                                 continue;
136                         seconds /= reldate[i].namelen;
137                         if (!string_format(buf, "%ld %s%s %s",
138                                            seconds, reldate[i].name,
139                                            seconds > 1 ? "s" : "",
140                                            now.tv_sec >= date ? "ago" : "ahead"))
141                                 break;
142                         return buf;
143                 }
144         }
146         if (date == DATE_LOCAL) {
147                 time_t date = time->sec + time->tz;
148                 localtime_r(&date, &tm);
149         }
150         else {
151                 gmtime_r(&time->sec, &tm);
152         }
153         return strftime(buf, sizeof(buf), DATE_FORMAT, &tm) ? buf : NULL;
157 #define AUTHOR_VALUES \
158         AUTHOR_(NO), \
159         AUTHOR_(FULL), \
160         AUTHOR_(ABBREVIATED)
162 enum author {
163 #define AUTHOR_(name) AUTHOR_##name
164         AUTHOR_VALUES,
165 #undef  AUTHOR_
166         AUTHOR_DEFAULT = AUTHOR_FULL
167 };
169 static const struct enum_map author_map[] = {
170 #define AUTHOR_(name) ENUM_MAP(#name, AUTHOR_##name)
171         AUTHOR_VALUES
172 #undef  AUTHOR_
173 };
175 static const char *
176 get_author_initials(const char *author)
178         static char initials[AUTHOR_COLS * 6 + 1];
179         size_t pos = 0;
180         const char *end = strchr(author, '\0');
182 #define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@' || (c) == '-')
184         memset(initials, 0, sizeof(initials));
185         while (author < end) {
186                 unsigned char bytes;
187                 size_t i;
189                 while (is_initial_sep(*author))
190                         author++;
192                 bytes = utf8_char_length(author, end);
193                 if (bytes < sizeof(initials) - 1 - pos) {
194                         while (bytes--) {
195                                 initials[pos++] = *author++;
196                         }
197                 }
199                 for (i = pos; author < end && !is_initial_sep(*author); author++) {
200                         if (i < sizeof(initials) - 1)
201                                 initials[i++] = *author;
202                 }
204                 initials[i++] = 0;
205         }
207         return initials;
211 /*
212  * User requests
213  */
215 #define REQ_INFO \
216         /* XXX: Keep the view request first and in sync with views[]. */ \
217         REQ_GROUP("View switching") \
218         REQ_(VIEW_MAIN,         "Show main view"), \
219         REQ_(VIEW_DIFF,         "Show diff view"), \
220         REQ_(VIEW_LOG,          "Show log view"), \
221         REQ_(VIEW_TREE,         "Show tree view"), \
222         REQ_(VIEW_BLOB,         "Show blob view"), \
223         REQ_(VIEW_BLAME,        "Show blame view"), \
224         REQ_(VIEW_BRANCH,       "Show branch view"), \
225         REQ_(VIEW_HELP,         "Show help page"), \
226         REQ_(VIEW_PAGER,        "Show pager view"), \
227         REQ_(VIEW_STATUS,       "Show status view"), \
228         REQ_(VIEW_STAGE,        "Show stage view"), \
229         \
230         REQ_GROUP("View manipulation") \
231         REQ_(ENTER,             "Enter current line and scroll"), \
232         REQ_(NEXT,              "Move to next"), \
233         REQ_(PREVIOUS,          "Move to previous"), \
234         REQ_(PARENT,            "Move to parent"), \
235         REQ_(VIEW_NEXT,         "Move focus to next view"), \
236         REQ_(REFRESH,           "Reload and refresh"), \
237         REQ_(MAXIMIZE,          "Maximize the current view"), \
238         REQ_(VIEW_CLOSE,        "Close the current view"), \
239         REQ_(QUIT,              "Close all views and quit"), \
240         \
241         REQ_GROUP("View specific requests") \
242         REQ_(STATUS_UPDATE,     "Update file status"), \
243         REQ_(STATUS_REVERT,     "Revert file changes"), \
244         REQ_(STATUS_MERGE,      "Merge file using external tool"), \
245         REQ_(STAGE_NEXT,        "Find next chunk to stage"), \
246         \
247         REQ_GROUP("Cursor navigation") \
248         REQ_(MOVE_UP,           "Move cursor one line up"), \
249         REQ_(MOVE_DOWN,         "Move cursor one line down"), \
250         REQ_(MOVE_PAGE_DOWN,    "Move cursor one page down"), \
251         REQ_(MOVE_PAGE_UP,      "Move cursor one page up"), \
252         REQ_(MOVE_FIRST_LINE,   "Move cursor to first line"), \
253         REQ_(MOVE_LAST_LINE,    "Move cursor to last line"), \
254         \
255         REQ_GROUP("Scrolling") \
256         REQ_(SCROLL_FIRST_COL,  "Scroll to the first line columns"), \
257         REQ_(SCROLL_LEFT,       "Scroll two columns left"), \
258         REQ_(SCROLL_RIGHT,      "Scroll two columns right"), \
259         REQ_(SCROLL_LINE_UP,    "Scroll one line up"), \
260         REQ_(SCROLL_LINE_DOWN,  "Scroll one line down"), \
261         REQ_(SCROLL_PAGE_UP,    "Scroll one page up"), \
262         REQ_(SCROLL_PAGE_DOWN,  "Scroll one page down"), \
263         \
264         REQ_GROUP("Searching") \
265         REQ_(SEARCH,            "Search the view"), \
266         REQ_(SEARCH_BACK,       "Search backwards in the view"), \
267         REQ_(FIND_NEXT,         "Find next search match"), \
268         REQ_(FIND_PREV,         "Find previous search match"), \
269         \
270         REQ_GROUP("Option manipulation") \
271         REQ_(OPTIONS,           "Open option menu"), \
272         REQ_(TOGGLE_LINENO,     "Toggle line numbers"), \
273         REQ_(TOGGLE_DATE,       "Toggle date display"), \
274         REQ_(TOGGLE_AUTHOR,     "Toggle author display"), \
275         REQ_(TOGGLE_REV_GRAPH,  "Toggle revision graph visualization"), \
276         REQ_(TOGGLE_GRAPHIC,    "Toggle (line) graphics mode"), \
277         REQ_(TOGGLE_REFS,       "Toggle reference display (tags/branches)"), \
278         REQ_(TOGGLE_SORT_ORDER, "Toggle ascending/descending sort order"), \
279         REQ_(TOGGLE_SORT_FIELD, "Toggle field to sort by"), \
280         \
281         REQ_GROUP("Misc") \
282         REQ_(PROMPT,            "Bring up the prompt"), \
283         REQ_(SCREEN_REDRAW,     "Redraw the screen"), \
284         REQ_(SHOW_VERSION,      "Show version information"), \
285         REQ_(STOP_LOADING,      "Stop all loading views"), \
286         REQ_(EDIT,              "Open in editor"), \
287         REQ_(NONE,              "Do nothing")
290 /* User action requests. */
291 enum request {
292 #define REQ_GROUP(help)
293 #define REQ_(req, help) REQ_##req
295         /* Offset all requests to avoid conflicts with ncurses getch values. */
296         REQ_UNKNOWN = KEY_MAX + 1,
297         REQ_OFFSET,
298         REQ_INFO
300 #undef  REQ_GROUP
301 #undef  REQ_
302 };
304 struct request_info {
305         enum request request;
306         const char *name;
307         int namelen;
308         const char *help;
309 };
311 static const struct request_info req_info[] = {
312 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
313 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
314         REQ_INFO
315 #undef  REQ_GROUP
316 #undef  REQ_
317 };
319 static enum request
320 get_request(const char *name)
322         int namelen = strlen(name);
323         int i;
325         for (i = 0; i < ARRAY_SIZE(req_info); i++)
326                 if (enum_equals(req_info[i], name, namelen))
327                         return req_info[i].request;
329         return REQ_UNKNOWN;
333 /*
334  * Options
335  */
337 /* Option and state variables. */
338 static enum graphic opt_line_graphics   = GRAPHIC_DEFAULT;
339 static enum date opt_date               = DATE_DEFAULT;
340 static enum author opt_author           = AUTHOR_DEFAULT;
341 static bool opt_rev_graph               = TRUE;
342 static bool opt_line_number             = FALSE;
343 static bool opt_show_refs               = TRUE;
344 static bool opt_untracked_dirs_content  = TRUE;
345 static int opt_num_interval             = 5;
346 static double opt_hscroll               = 0.50;
347 static double opt_scale_split_view      = 2.0 / 3.0;
348 static int opt_tab_size                 = 8;
349 static int opt_author_cols              = AUTHOR_COLS;
350 static char opt_path[SIZEOF_STR]        = "";
351 static char opt_file[SIZEOF_STR]        = "";
352 static char opt_ref[SIZEOF_REF]         = "";
353 static char opt_head[SIZEOF_REF]        = "";
354 static char opt_remote[SIZEOF_REF]      = "";
355 static char opt_encoding[20]            = "UTF-8";
356 static iconv_t opt_iconv_in             = ICONV_NONE;
357 static iconv_t opt_iconv_out            = ICONV_NONE;
358 static char opt_search[SIZEOF_STR]      = "";
359 static char opt_cdup[SIZEOF_STR]        = "";
360 static char opt_prefix[SIZEOF_STR]      = "";
361 static char opt_git_dir[SIZEOF_STR]     = "";
362 static signed char opt_is_inside_work_tree      = -1; /* set to TRUE or FALSE */
363 static char opt_editor[SIZEOF_STR]      = "";
364 static FILE *opt_tty                    = NULL;
365 static const char **opt_diff_argv       = NULL;
366 static const char **opt_rev_argv        = NULL;
367 static const char **opt_file_argv       = NULL;
368 static const char **opt_blame_argv      = NULL;
370 #define is_initial_commit()     (!get_ref_head())
371 #define is_head_commit(rev)     (!strcmp((rev), "HEAD") || (get_ref_head() && !strcmp(rev, get_ref_head()->id)))
374 /*
375  * Line-oriented content detection.
376  */
378 #define LINE_INFO \
379 LINE(DIFF_HEADER,  "diff --git ",       COLOR_YELLOW,   COLOR_DEFAULT,  0), \
380 LINE(DIFF_CHUNK,   "@@",                COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
381 LINE(DIFF_ADD,     "+",                 COLOR_GREEN,    COLOR_DEFAULT,  0), \
382 LINE(DIFF_DEL,     "-",                 COLOR_RED,      COLOR_DEFAULT,  0), \
383 LINE(DIFF_INDEX,        "index ",         COLOR_BLUE,   COLOR_DEFAULT,  0), \
384 LINE(DIFF_OLDMODE,      "old file mode ", COLOR_YELLOW, COLOR_DEFAULT,  0), \
385 LINE(DIFF_NEWMODE,      "new file mode ", COLOR_YELLOW, COLOR_DEFAULT,  0), \
386 LINE(DIFF_COPY_FROM,    "copy from",      COLOR_YELLOW, COLOR_DEFAULT,  0), \
387 LINE(DIFF_COPY_TO,      "copy to",        COLOR_YELLOW, COLOR_DEFAULT,  0), \
388 LINE(DIFF_RENAME_FROM,  "rename from",    COLOR_YELLOW, COLOR_DEFAULT,  0), \
389 LINE(DIFF_RENAME_TO,    "rename to",      COLOR_YELLOW, COLOR_DEFAULT,  0), \
390 LINE(DIFF_SIMILARITY,   "similarity ",    COLOR_YELLOW, COLOR_DEFAULT,  0), \
391 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT,  0), \
392 LINE(DIFF_TREE,         "diff-tree ",     COLOR_BLUE,   COLOR_DEFAULT,  0), \
393 LINE(PP_AUTHOR,    "Author: ",          COLOR_CYAN,     COLOR_DEFAULT,  0), \
394 LINE(PP_COMMIT,    "Commit: ",          COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
395 LINE(PP_MERGE,     "Merge: ",           COLOR_BLUE,     COLOR_DEFAULT,  0), \
396 LINE(PP_DATE,      "Date:   ",          COLOR_YELLOW,   COLOR_DEFAULT,  0), \
397 LINE(PP_ADATE,     "AuthorDate: ",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
398 LINE(PP_CDATE,     "CommitDate: ",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
399 LINE(PP_REFS,      "Refs: ",            COLOR_RED,      COLOR_DEFAULT,  0), \
400 LINE(COMMIT,       "commit ",           COLOR_GREEN,    COLOR_DEFAULT,  0), \
401 LINE(PARENT,       "parent ",           COLOR_BLUE,     COLOR_DEFAULT,  0), \
402 LINE(TREE,         "tree ",             COLOR_BLUE,     COLOR_DEFAULT,  0), \
403 LINE(AUTHOR,       "author ",           COLOR_GREEN,    COLOR_DEFAULT,  0), \
404 LINE(COMMITTER,    "committer ",        COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
405 LINE(SIGNOFF,      "    Signed-off-by", COLOR_YELLOW,   COLOR_DEFAULT,  0), \
406 LINE(ACKED,        "    Acked-by",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
407 LINE(TESTED,       "    Tested-by",     COLOR_YELLOW,   COLOR_DEFAULT,  0), \
408 LINE(REVIEWED,     "    Reviewed-by",   COLOR_YELLOW,   COLOR_DEFAULT,  0), \
409 LINE(DEFAULT,      "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  A_NORMAL), \
410 LINE(CURSOR,       "",                  COLOR_WHITE,    COLOR_GREEN,    A_BOLD), \
411 LINE(STATUS,       "",                  COLOR_GREEN,    COLOR_DEFAULT,  0), \
412 LINE(DELIMITER,    "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
413 LINE(DATE,         "",                  COLOR_BLUE,     COLOR_DEFAULT,  0), \
414 LINE(MODE,         "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
415 LINE(LINE_NUMBER,  "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
416 LINE(TITLE_BLUR,   "",                  COLOR_WHITE,    COLOR_BLUE,     0), \
417 LINE(TITLE_FOCUS,  "",                  COLOR_WHITE,    COLOR_BLUE,     A_BOLD), \
418 LINE(MAIN_COMMIT,  "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  0), \
419 LINE(MAIN_TAG,     "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  A_BOLD), \
420 LINE(MAIN_LOCAL_TAG,"",                 COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
421 LINE(MAIN_REMOTE,  "",                  COLOR_YELLOW,   COLOR_DEFAULT,  0), \
422 LINE(MAIN_TRACKED, "",                  COLOR_YELLOW,   COLOR_DEFAULT,  A_BOLD), \
423 LINE(MAIN_REF,     "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
424 LINE(MAIN_HEAD,    "",                  COLOR_CYAN,     COLOR_DEFAULT,  A_BOLD), \
425 LINE(MAIN_REVGRAPH,"",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
426 LINE(TREE_HEAD,    "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  A_BOLD), \
427 LINE(TREE_DIR,     "",                  COLOR_YELLOW,   COLOR_DEFAULT,  A_NORMAL), \
428 LINE(TREE_FILE,    "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  A_NORMAL), \
429 LINE(STAT_HEAD,    "",                  COLOR_YELLOW,   COLOR_DEFAULT,  0), \
430 LINE(STAT_SECTION, "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
431 LINE(STAT_NONE,    "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  0), \
432 LINE(STAT_STAGED,  "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
433 LINE(STAT_UNSTAGED,"",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
434 LINE(STAT_UNTRACKED,"",                 COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
435 LINE(HELP_KEYMAP,  "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
436 LINE(HELP_GROUP,   "",                  COLOR_BLUE,     COLOR_DEFAULT,  0), \
437 LINE(BLAME_ID,     "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
438 LINE(GRAPH_LINE_0, "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
439 LINE(GRAPH_LINE_1, "",                  COLOR_YELLOW,   COLOR_DEFAULT,  0), \
440 LINE(GRAPH_LINE_2, "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
441 LINE(GRAPH_LINE_3, "",                  COLOR_GREEN,    COLOR_DEFAULT,  0), \
442 LINE(GRAPH_LINE_4, "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  0), \
443 LINE(GRAPH_LINE_5, "",                  COLOR_WHITE,    COLOR_DEFAULT,  0), \
444 LINE(GRAPH_LINE_6, "",                  COLOR_RED,      COLOR_DEFAULT,  0), \
445 LINE(GRAPH_COMMIT, "",                  COLOR_BLUE,     COLOR_DEFAULT,  0)
447 enum line_type {
448 #define LINE(type, line, fg, bg, attr) \
449         LINE_##type
450         LINE_INFO,
451         LINE_NONE
452 #undef  LINE
453 };
455 struct line_info {
456         const char *name;       /* Option name. */
457         int namelen;            /* Size of option name. */
458         const char *line;       /* The start of line to match. */
459         int linelen;            /* Size of string to match. */
460         int fg, bg, attr;       /* Color and text attributes for the lines. */
461 };
463 static struct line_info line_info[] = {
464 #define LINE(type, line, fg, bg, attr) \
465         { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
466         LINE_INFO
467 #undef  LINE
468 };
470 static enum line_type
471 get_line_type(const char *line)
473         int linelen = strlen(line);
474         enum line_type type;
476         for (type = 0; type < ARRAY_SIZE(line_info); type++)
477                 /* Case insensitive search matches Signed-off-by lines better. */
478                 if (linelen >= line_info[type].linelen &&
479                     !strncasecmp(line_info[type].line, line, line_info[type].linelen))
480                         return type;
482         return LINE_DEFAULT;
485 static inline int
486 get_line_attr(enum line_type type)
488         assert(type < ARRAY_SIZE(line_info));
489         return COLOR_PAIR(type) | line_info[type].attr;
492 static struct line_info *
493 get_line_info(const char *name)
495         size_t namelen = strlen(name);
496         enum line_type type;
498         for (type = 0; type < ARRAY_SIZE(line_info); type++)
499                 if (enum_equals(line_info[type], name, namelen))
500                         return &line_info[type];
502         return NULL;
505 static void
506 init_colors(void)
508         int default_bg = line_info[LINE_DEFAULT].bg;
509         int default_fg = line_info[LINE_DEFAULT].fg;
510         enum line_type type;
512         start_color();
514         if (assume_default_colors(default_fg, default_bg) == ERR) {
515                 default_bg = COLOR_BLACK;
516                 default_fg = COLOR_WHITE;
517         }
519         for (type = 0; type < ARRAY_SIZE(line_info); type++) {
520                 struct line_info *info = &line_info[type];
521                 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
522                 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
524                 init_pair(type, fg, bg);
525         }
528 struct line {
529         enum line_type type;
531         /* State flags */
532         unsigned int selected:1;
533         unsigned int dirty:1;
534         unsigned int cleareol:1;
535         unsigned int other:16;
537         void *data;             /* User data */
538 };
541 /*
542  * Keys
543  */
545 struct keybinding {
546         int alias;
547         enum request request;
548 };
550 static struct keybinding default_keybindings[] = {
551         /* View switching */
552         { 'm',          REQ_VIEW_MAIN },
553         { 'd',          REQ_VIEW_DIFF },
554         { 'l',          REQ_VIEW_LOG },
555         { 't',          REQ_VIEW_TREE },
556         { 'f',          REQ_VIEW_BLOB },
557         { 'B',          REQ_VIEW_BLAME },
558         { 'H',          REQ_VIEW_BRANCH },
559         { 'p',          REQ_VIEW_PAGER },
560         { 'h',          REQ_VIEW_HELP },
561         { 'S',          REQ_VIEW_STATUS },
562         { 'c',          REQ_VIEW_STAGE },
564         /* View manipulation */
565         { 'q',          REQ_VIEW_CLOSE },
566         { KEY_TAB,      REQ_VIEW_NEXT },
567         { KEY_RETURN,   REQ_ENTER },
568         { KEY_UP,       REQ_PREVIOUS },
569         { KEY_CTL('P'), REQ_PREVIOUS },
570         { KEY_DOWN,     REQ_NEXT },
571         { KEY_CTL('N'), REQ_NEXT },
572         { 'R',          REQ_REFRESH },
573         { KEY_F(5),     REQ_REFRESH },
574         { 'O',          REQ_MAXIMIZE },
576         /* Cursor navigation */
577         { 'k',          REQ_MOVE_UP },
578         { 'j',          REQ_MOVE_DOWN },
579         { KEY_HOME,     REQ_MOVE_FIRST_LINE },
580         { KEY_END,      REQ_MOVE_LAST_LINE },
581         { KEY_NPAGE,    REQ_MOVE_PAGE_DOWN },
582         { KEY_CTL('D'), REQ_MOVE_PAGE_DOWN },
583         { ' ',          REQ_MOVE_PAGE_DOWN },
584         { KEY_PPAGE,    REQ_MOVE_PAGE_UP },
585         { KEY_CTL('U'), REQ_MOVE_PAGE_UP },
586         { 'b',          REQ_MOVE_PAGE_UP },
587         { '-',          REQ_MOVE_PAGE_UP },
589         /* Scrolling */
590         { '|',          REQ_SCROLL_FIRST_COL },
591         { KEY_LEFT,     REQ_SCROLL_LEFT },
592         { KEY_RIGHT,    REQ_SCROLL_RIGHT },
593         { KEY_IC,       REQ_SCROLL_LINE_UP },
594         { KEY_CTL('Y'), REQ_SCROLL_LINE_UP },
595         { KEY_DC,       REQ_SCROLL_LINE_DOWN },
596         { KEY_CTL('E'), REQ_SCROLL_LINE_DOWN },
597         { 'w',          REQ_SCROLL_PAGE_UP },
598         { 's',          REQ_SCROLL_PAGE_DOWN },
600         /* Searching */
601         { '/',          REQ_SEARCH },
602         { '?',          REQ_SEARCH_BACK },
603         { 'n',          REQ_FIND_NEXT },
604         { 'N',          REQ_FIND_PREV },
606         /* Misc */
607         { 'Q',          REQ_QUIT },
608         { 'z',          REQ_STOP_LOADING },
609         { 'v',          REQ_SHOW_VERSION },
610         { 'r',          REQ_SCREEN_REDRAW },
611         { KEY_CTL('L'), REQ_SCREEN_REDRAW },
612         { 'o',          REQ_OPTIONS },
613         { '.',          REQ_TOGGLE_LINENO },
614         { 'D',          REQ_TOGGLE_DATE },
615         { 'A',          REQ_TOGGLE_AUTHOR },
616         { 'g',          REQ_TOGGLE_REV_GRAPH },
617         { '~',          REQ_TOGGLE_GRAPHIC },
618         { 'F',          REQ_TOGGLE_REFS },
619         { 'I',          REQ_TOGGLE_SORT_ORDER },
620         { 'i',          REQ_TOGGLE_SORT_FIELD },
621         { ':',          REQ_PROMPT },
622         { 'u',          REQ_STATUS_UPDATE },
623         { '!',          REQ_STATUS_REVERT },
624         { 'M',          REQ_STATUS_MERGE },
625         { '@',          REQ_STAGE_NEXT },
626         { ',',          REQ_PARENT },
627         { 'e',          REQ_EDIT },
628 };
630 #define KEYMAP_INFO \
631         KEYMAP_(GENERIC), \
632         KEYMAP_(MAIN), \
633         KEYMAP_(DIFF), \
634         KEYMAP_(LOG), \
635         KEYMAP_(TREE), \
636         KEYMAP_(BLOB), \
637         KEYMAP_(BLAME), \
638         KEYMAP_(BRANCH), \
639         KEYMAP_(PAGER), \
640         KEYMAP_(HELP), \
641         KEYMAP_(STATUS), \
642         KEYMAP_(STAGE)
644 enum keymap {
645 #define KEYMAP_(name) KEYMAP_##name
646         KEYMAP_INFO
647 #undef  KEYMAP_
648 };
650 static const struct enum_map keymap_table[] = {
651 #define KEYMAP_(name) ENUM_MAP(#name, KEYMAP_##name)
652         KEYMAP_INFO
653 #undef  KEYMAP_
654 };
656 #define set_keymap(map, name) map_enum(map, keymap_table, name)
658 struct keybinding_table {
659         struct keybinding *data;
660         size_t size;
661 };
663 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
665 static void
666 add_keybinding(enum keymap keymap, enum request request, int key)
668         struct keybinding_table *table = &keybindings[keymap];
669         size_t i;
671         for (i = 0; i < keybindings[keymap].size; i++) {
672                 if (keybindings[keymap].data[i].alias == key) {
673                         keybindings[keymap].data[i].request = request;
674                         return;
675                 }
676         }
678         table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
679         if (!table->data)
680                 die("Failed to allocate keybinding");
681         table->data[table->size].alias = key;
682         table->data[table->size++].request = request;
684         if (request == REQ_NONE && keymap == KEYMAP_GENERIC) {
685                 int i;
687                 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
688                         if (default_keybindings[i].alias == key)
689                                 default_keybindings[i].request = REQ_NONE;
690         }
693 /* Looks for a key binding first in the given map, then in the generic map, and
694  * lastly in the default keybindings. */
695 static enum request
696 get_keybinding(enum keymap keymap, int key)
698         size_t i;
700         for (i = 0; i < keybindings[keymap].size; i++)
701                 if (keybindings[keymap].data[i].alias == key)
702                         return keybindings[keymap].data[i].request;
704         for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
705                 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
706                         return keybindings[KEYMAP_GENERIC].data[i].request;
708         for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
709                 if (default_keybindings[i].alias == key)
710                         return default_keybindings[i].request;
712         return (enum request) key;
716 struct key {
717         const char *name;
718         int value;
719 };
721 static const struct key key_table[] = {
722         { "Enter",      KEY_RETURN },
723         { "Space",      ' ' },
724         { "Backspace",  KEY_BACKSPACE },
725         { "Tab",        KEY_TAB },
726         { "Escape",     KEY_ESC },
727         { "Left",       KEY_LEFT },
728         { "Right",      KEY_RIGHT },
729         { "Up",         KEY_UP },
730         { "Down",       KEY_DOWN },
731         { "Insert",     KEY_IC },
732         { "Delete",     KEY_DC },
733         { "Hash",       '#' },
734         { "Home",       KEY_HOME },
735         { "End",        KEY_END },
736         { "PageUp",     KEY_PPAGE },
737         { "PageDown",   KEY_NPAGE },
738         { "F1",         KEY_F(1) },
739         { "F2",         KEY_F(2) },
740         { "F3",         KEY_F(3) },
741         { "F4",         KEY_F(4) },
742         { "F5",         KEY_F(5) },
743         { "F6",         KEY_F(6) },
744         { "F7",         KEY_F(7) },
745         { "F8",         KEY_F(8) },
746         { "F9",         KEY_F(9) },
747         { "F10",        KEY_F(10) },
748         { "F11",        KEY_F(11) },
749         { "F12",        KEY_F(12) },
750 };
752 static int
753 get_key_value(const char *name)
755         int i;
757         for (i = 0; i < ARRAY_SIZE(key_table); i++)
758                 if (!strcasecmp(key_table[i].name, name))
759                         return key_table[i].value;
761         if (strlen(name) == 2 && name[0] == '^' && isprint(*name))
762                 return (int)name[1] & 0x1f;
763         if (strlen(name) == 1 && isprint(*name))
764                 return (int) *name;
765         return ERR;
768 static const char *
769 get_key_name(int key_value)
771         static char key_char[] = "'X'\0";
772         const char *seq = NULL;
773         int key;
775         for (key = 0; key < ARRAY_SIZE(key_table); key++)
776                 if (key_table[key].value == key_value)
777                         seq = key_table[key].name;
779         if (seq == NULL && key_value < 0x7f) {
780                 char *s = key_char + 1;
782                 if (key_value >= 0x20) {
783                         *s++ = key_value;
784                 } else {
785                         *s++ = '^';
786                         *s++ = 0x40 | (key_value & 0x1f);
787                 }
788                 *s++ = '\'';
789                 *s++ = '\0';
790                 seq = key_char;
791         }
793         return seq ? seq : "(no key)";
796 static bool
797 append_key(char *buf, size_t *pos, const struct keybinding *keybinding)
799         const char *sep = *pos > 0 ? ", " : "";
800         const char *keyname = get_key_name(keybinding->alias);
802         return string_nformat(buf, BUFSIZ, pos, "%s%s", sep, keyname);
805 static bool
806 append_keymap_request_keys(char *buf, size_t *pos, enum request request,
807                            enum keymap keymap, bool all)
809         int i;
811         for (i = 0; i < keybindings[keymap].size; i++) {
812                 if (keybindings[keymap].data[i].request == request) {
813                         if (!append_key(buf, pos, &keybindings[keymap].data[i]))
814                                 return FALSE;
815                         if (!all)
816                                 break;
817                 }
818         }
820         return TRUE;
823 #define get_key(keymap, request) get_keys(keymap, request, FALSE)
825 static const char *
826 get_keys(enum keymap keymap, enum request request, bool all)
828         static char buf[BUFSIZ];
829         size_t pos = 0;
830         int i;
832         buf[pos] = 0;
834         if (!append_keymap_request_keys(buf, &pos, request, keymap, all))
835                 return "Too many keybindings!";
836         if (pos > 0 && !all)
837                 return buf;
839         if (keymap != KEYMAP_GENERIC) {
840                 /* Only the generic keymap includes the default keybindings when
841                  * listing all keys. */
842                 if (all)
843                         return buf;
845                 if (!append_keymap_request_keys(buf, &pos, request, KEYMAP_GENERIC, all))
846                         return "Too many keybindings!";
847                 if (pos)
848                         return buf;
849         }
851         for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
852                 if (default_keybindings[i].request == request) {
853                         if (!append_key(buf, &pos, &default_keybindings[i]))
854                                 return "Too many keybindings!";
855                         if (!all)
856                                 return buf;
857                 }
858         }
860         return buf;
863 struct run_request {
864         enum keymap keymap;
865         int key;
866         const char **argv;
867 };
869 static struct run_request *run_request;
870 static size_t run_requests;
872 DEFINE_ALLOCATOR(realloc_run_requests, struct run_request, 8)
874 static enum request
875 add_run_request(enum keymap keymap, int key, const char **argv)
877         struct run_request *req;
879         if (!realloc_run_requests(&run_request, run_requests, 1))
880                 return REQ_NONE;
882         req = &run_request[run_requests];
883         req->keymap = keymap;
884         req->key = key;
885         req->argv = NULL;
887         if (!argv_copy(&req->argv, argv))
888                 return REQ_NONE;
890         return REQ_NONE + ++run_requests;
893 static struct run_request *
894 get_run_request(enum request request)
896         if (request <= REQ_NONE)
897                 return NULL;
898         return &run_request[request - REQ_NONE - 1];
901 static void
902 add_builtin_run_requests(void)
904         const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
905         const char *checkout[] = { "git", "checkout", "%(branch)", NULL };
906         const char *commit[] = { "git", "commit", NULL };
907         const char *gc[] = { "git", "gc", NULL };
908         struct run_request reqs[] = {
909                 { KEYMAP_MAIN,    'C', cherry_pick },
910                 { KEYMAP_STATUS,  'C', commit },
911                 { KEYMAP_BRANCH,  'C', checkout },
912                 { KEYMAP_GENERIC, 'G', gc },
913         };
914         int i;
916         for (i = 0; i < ARRAY_SIZE(reqs); i++) {
917                 enum request req = get_keybinding(reqs[i].keymap, reqs[i].key);
919                 if (req != reqs[i].key)
920                         continue;
921                 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argv);
922                 if (req != REQ_NONE)
923                         add_keybinding(reqs[i].keymap, req, reqs[i].key);
924         }
927 /*
928  * User config file handling.
929  */
931 #define OPT_ERR_INFO \
932         OPT_ERR_(INTEGER_VALUE_OUT_OF_BOUND, "Integer value out of bound"), \
933         OPT_ERR_(INVALID_STEP_VALUE, "Invalid step value"), \
934         OPT_ERR_(NO_OPTION_VALUE, "No option value"), \
935         OPT_ERR_(NO_VALUE_ASSIGNED, "No value assigned"), \
936         OPT_ERR_(OBSOLETE_REQUEST_NAME, "Obsolete request name"), \
937         OPT_ERR_(OUT_OF_MEMORY, "Out of memory"), \
938         OPT_ERR_(TOO_MANY_OPTION_ARGUMENTS, "Too many option arguments"), \
939         OPT_ERR_(UNKNOWN_ATTRIBUTE, "Unknown attribute"), \
940         OPT_ERR_(UNKNOWN_COLOR, "Unknown color"), \
941         OPT_ERR_(UNKNOWN_COLOR_NAME, "Unknown color name"), \
942         OPT_ERR_(UNKNOWN_KEY, "Unknown key"), \
943         OPT_ERR_(UNKNOWN_KEY_MAP, "Unknown key map"), \
944         OPT_ERR_(UNKNOWN_OPTION_COMMAND, "Unknown option command"), \
945         OPT_ERR_(UNKNOWN_REQUEST_NAME, "Unknown request name"), \
946         OPT_ERR_(UNKNOWN_VARIABLE_NAME, "Unknown variable name"), \
947         OPT_ERR_(UNMATCHED_QUOTATION, "Unmatched quotation"), \
948         OPT_ERR_(WRONG_NUMBER_OF_ARGUMENTS, "Wrong number of arguments"),
950 enum option_code {
951 #define OPT_ERR_(name, msg) OPT_ERR_ ## name
952         OPT_ERR_INFO
953 #undef  OPT_ERR_
954         OPT_OK
955 };
957 static const char *option_errors[] = {
958 #define OPT_ERR_(name, msg) msg
959         OPT_ERR_INFO
960 #undef  OPT_ERR_
961 };
963 static const struct enum_map color_map[] = {
964 #define COLOR_MAP(name) ENUM_MAP(#name, COLOR_##name)
965         COLOR_MAP(DEFAULT),
966         COLOR_MAP(BLACK),
967         COLOR_MAP(BLUE),
968         COLOR_MAP(CYAN),
969         COLOR_MAP(GREEN),
970         COLOR_MAP(MAGENTA),
971         COLOR_MAP(RED),
972         COLOR_MAP(WHITE),
973         COLOR_MAP(YELLOW),
974 };
976 static const struct enum_map attr_map[] = {
977 #define ATTR_MAP(name) ENUM_MAP(#name, A_##name)
978         ATTR_MAP(NORMAL),
979         ATTR_MAP(BLINK),
980         ATTR_MAP(BOLD),
981         ATTR_MAP(DIM),
982         ATTR_MAP(REVERSE),
983         ATTR_MAP(STANDOUT),
984         ATTR_MAP(UNDERLINE),
985 };
987 #define set_attribute(attr, name)       map_enum(attr, attr_map, name)
989 static enum option_code
990 parse_step(double *opt, const char *arg)
992         *opt = atoi(arg);
993         if (!strchr(arg, '%'))
994                 return OPT_OK;
996         /* "Shift down" so 100% and 1 does not conflict. */
997         *opt = (*opt - 1) / 100;
998         if (*opt >= 1.0) {
999                 *opt = 0.99;
1000                 return OPT_ERR_INVALID_STEP_VALUE;
1001         }
1002         if (*opt < 0.0) {
1003                 *opt = 1;
1004                 return OPT_ERR_INVALID_STEP_VALUE;
1005         }
1006         return OPT_OK;
1009 static enum option_code
1010 parse_int(int *opt, const char *arg, int min, int max)
1012         int value = atoi(arg);
1014         if (min <= value && value <= max) {
1015                 *opt = value;
1016                 return OPT_OK;
1017         }
1019         return OPT_ERR_INTEGER_VALUE_OUT_OF_BOUND;
1022 static bool
1023 set_color(int *color, const char *name)
1025         if (map_enum(color, color_map, name))
1026                 return TRUE;
1027         if (!prefixcmp(name, "color"))
1028                 return parse_int(color, name + 5, 0, 255) == OK;
1029         return FALSE;
1032 /* Wants: object fgcolor bgcolor [attribute] */
1033 static enum option_code
1034 option_color_command(int argc, const char *argv[])
1036         struct line_info *info;
1038         if (argc < 3)
1039                 return OPT_ERR_WRONG_NUMBER_OF_ARGUMENTS;
1041         info = get_line_info(argv[0]);
1042         if (!info) {
1043                 static const struct enum_map obsolete[] = {
1044                         ENUM_MAP("main-delim",  LINE_DELIMITER),
1045                         ENUM_MAP("main-date",   LINE_DATE),
1046                         ENUM_MAP("main-author", LINE_AUTHOR),
1047                 };
1048                 int index;
1050                 if (!map_enum(&index, obsolete, argv[0]))
1051                         return OPT_ERR_UNKNOWN_COLOR_NAME;
1052                 info = &line_info[index];
1053         }
1055         if (!set_color(&info->fg, argv[1]) ||
1056             !set_color(&info->bg, argv[2]))
1057                 return OPT_ERR_UNKNOWN_COLOR;
1059         info->attr = 0;
1060         while (argc-- > 3) {
1061                 int attr;
1063                 if (!set_attribute(&attr, argv[argc]))
1064                         return OPT_ERR_UNKNOWN_ATTRIBUTE;
1065                 info->attr |= attr;
1066         }
1068         return OPT_OK;
1071 static enum option_code
1072 parse_bool(bool *opt, const char *arg)
1074         *opt = (!strcmp(arg, "1") || !strcmp(arg, "true") || !strcmp(arg, "yes"))
1075                 ? TRUE : FALSE;
1076         return OPT_OK;
1079 static enum option_code
1080 parse_enum_do(unsigned int *opt, const char *arg,
1081               const struct enum_map *map, size_t map_size)
1083         bool is_true;
1085         assert(map_size > 1);
1087         if (map_enum_do(map, map_size, (int *) opt, arg))
1088                 return OPT_OK;
1090         parse_bool(&is_true, arg);
1091         *opt = is_true ? map[1].value : map[0].value;
1092         return OPT_OK;
1095 #define parse_enum(opt, arg, map) \
1096         parse_enum_do(opt, arg, map, ARRAY_SIZE(map))
1098 static enum option_code
1099 parse_string(char *opt, const char *arg, size_t optsize)
1101         int arglen = strlen(arg);
1103         switch (arg[0]) {
1104         case '\"':
1105         case '\'':
1106                 if (arglen == 1 || arg[arglen - 1] != arg[0])
1107                         return OPT_ERR_UNMATCHED_QUOTATION;
1108                 arg += 1; arglen -= 2;
1109         default:
1110                 string_ncopy_do(opt, optsize, arg, arglen);
1111                 return OPT_OK;
1112         }
1115 static enum option_code
1116 parse_args(const char ***args, const char *argv[])
1118         if (*args == NULL && !argv_copy(args, argv))
1119                 return OPT_ERR_OUT_OF_MEMORY;
1120         return OPT_OK;
1123 /* Wants: name = value */
1124 static enum option_code
1125 option_set_command(int argc, const char *argv[])
1127         if (argc < 3)
1128                 return OPT_ERR_WRONG_NUMBER_OF_ARGUMENTS;
1130         if (strcmp(argv[1], "="))
1131                 return OPT_ERR_NO_VALUE_ASSIGNED;
1133         if (!strcmp(argv[0], "blame-options"))
1134                 return parse_args(&opt_blame_argv, argv + 2);
1136         if (argc != 3)
1137                 return OPT_ERR_WRONG_NUMBER_OF_ARGUMENTS;
1139         if (!strcmp(argv[0], "show-author"))
1140                 return parse_enum(&opt_author, argv[2], author_map);
1142         if (!strcmp(argv[0], "show-date"))
1143                 return parse_enum(&opt_date, argv[2], date_map);
1145         if (!strcmp(argv[0], "show-rev-graph"))
1146                 return parse_bool(&opt_rev_graph, argv[2]);
1148         if (!strcmp(argv[0], "show-refs"))
1149                 return parse_bool(&opt_show_refs, argv[2]);
1151         if (!strcmp(argv[0], "show-line-numbers"))
1152                 return parse_bool(&opt_line_number, argv[2]);
1154         if (!strcmp(argv[0], "line-graphics"))
1155                 return parse_enum(&opt_line_graphics, argv[2], graphic_map);
1157         if (!strcmp(argv[0], "line-number-interval"))
1158                 return parse_int(&opt_num_interval, argv[2], 1, 1024);
1160         if (!strcmp(argv[0], "author-width"))
1161                 return parse_int(&opt_author_cols, argv[2], 0, 1024);
1163         if (!strcmp(argv[0], "horizontal-scroll"))
1164                 return parse_step(&opt_hscroll, argv[2]);
1166         if (!strcmp(argv[0], "split-view-height"))
1167                 return parse_step(&opt_scale_split_view, argv[2]);
1169         if (!strcmp(argv[0], "tab-size"))
1170                 return parse_int(&opt_tab_size, argv[2], 1, 1024);
1172         if (!strcmp(argv[0], "commit-encoding"))
1173                 return parse_string(opt_encoding, argv[2], sizeof(opt_encoding));
1175         if (!strcmp(argv[0], "status-untracked-dirs"))
1176                 return parse_bool(&opt_untracked_dirs_content, argv[2]);
1178         return OPT_ERR_UNKNOWN_VARIABLE_NAME;
1181 /* Wants: mode request key */
1182 static enum option_code
1183 option_bind_command(int argc, const char *argv[])
1185         enum request request;
1186         int keymap = -1;
1187         int key;
1189         if (argc < 3)
1190                 return OPT_ERR_WRONG_NUMBER_OF_ARGUMENTS;
1192         if (!set_keymap(&keymap, argv[0]))
1193                 return OPT_ERR_UNKNOWN_KEY_MAP;
1195         key = get_key_value(argv[1]);
1196         if (key == ERR)
1197                 return OPT_ERR_UNKNOWN_KEY;
1199         request = get_request(argv[2]);
1200         if (request == REQ_UNKNOWN) {
1201                 static const struct enum_map obsolete[] = {
1202                         ENUM_MAP("cherry-pick",         REQ_NONE),
1203                         ENUM_MAP("screen-resize",       REQ_NONE),
1204                         ENUM_MAP("tree-parent",         REQ_PARENT),
1205                 };
1206                 int alias;
1208                 if (map_enum(&alias, obsolete, argv[2])) {
1209                         if (alias != REQ_NONE)
1210                                 add_keybinding(keymap, alias, key);
1211                         return OPT_ERR_OBSOLETE_REQUEST_NAME;
1212                 }
1213         }
1214         if (request == REQ_UNKNOWN && *argv[2]++ == '!')
1215                 request = add_run_request(keymap, key, argv + 2);
1216         if (request == REQ_UNKNOWN)
1217                 return OPT_ERR_UNKNOWN_REQUEST_NAME;
1219         add_keybinding(keymap, request, key);
1221         return OPT_OK;
1224 static enum option_code
1225 set_option(const char *opt, char *value)
1227         const char *argv[SIZEOF_ARG];
1228         int argc = 0;
1230         if (!argv_from_string(argv, &argc, value))
1231                 return OPT_ERR_TOO_MANY_OPTION_ARGUMENTS;
1233         if (!strcmp(opt, "color"))
1234                 return option_color_command(argc, argv);
1236         if (!strcmp(opt, "set"))
1237                 return option_set_command(argc, argv);
1239         if (!strcmp(opt, "bind"))
1240                 return option_bind_command(argc, argv);
1242         return OPT_ERR_UNKNOWN_OPTION_COMMAND;
1245 struct config_state {
1246         int lineno;
1247         bool errors;
1248 };
1250 static int
1251 read_option(char *opt, size_t optlen, char *value, size_t valuelen, void *data)
1253         struct config_state *config = data;
1254         enum option_code status = OPT_ERR_NO_OPTION_VALUE;
1256         config->lineno++;
1258         /* Check for comment markers, since read_properties() will
1259          * only ensure opt and value are split at first " \t". */
1260         optlen = strcspn(opt, "#");
1261         if (optlen == 0)
1262                 return OK;
1264         if (opt[optlen] == 0) {
1265                 /* Look for comment endings in the value. */
1266                 size_t len = strcspn(value, "#");
1268                 if (len < valuelen) {
1269                         valuelen = len;
1270                         value[valuelen] = 0;
1271                 }
1273                 status = set_option(opt, value);
1274         }
1276         if (status != OPT_OK) {
1277                 warn("Error on line %d, near '%.*s': %s",
1278                      config->lineno, (int) optlen, opt, option_errors[status]);
1279                 config->errors = TRUE;
1280         }
1282         /* Always keep going if errors are encountered. */
1283         return OK;
1286 static void
1287 load_option_file(const char *path)
1289         struct config_state config = { 0, FALSE };
1290         struct io io;
1292         /* It's OK that the file doesn't exist. */
1293         if (!io_open(&io, "%s", path))
1294                 return;
1296         if (io_load(&io, " \t", read_option, &config) == ERR ||
1297             config.errors == TRUE)
1298                 warn("Errors while loading %s.", path);
1301 static int
1302 load_options(void)
1304         const char *home = getenv("HOME");
1305         const char *tigrc_user = getenv("TIGRC_USER");
1306         const char *tigrc_system = getenv("TIGRC_SYSTEM");
1307         const char *tig_diff_opts = getenv("TIG_DIFF_OPTS");
1308         char buf[SIZEOF_STR];
1310         if (!tigrc_system)
1311                 tigrc_system = SYSCONFDIR "/tigrc";
1312         load_option_file(tigrc_system);
1314         if (!tigrc_user) {
1315                 if (!home || !string_format(buf, "%s/.tigrc", home))
1316                         return ERR;
1317                 tigrc_user = buf;
1318         }
1319         load_option_file(tigrc_user);
1321         /* Add _after_ loading config files to avoid adding run requests
1322          * that conflict with keybindings. */
1323         add_builtin_run_requests();
1325         if (!opt_diff_argv && tig_diff_opts && *tig_diff_opts) {
1326                 static const char *diff_opts[SIZEOF_ARG] = { NULL };
1327                 int argc = 0;
1329                 if (!string_format(buf, "%s", tig_diff_opts) ||
1330                     !argv_from_string(diff_opts, &argc, buf))
1331                         die("TIG_DIFF_OPTS contains too many arguments");
1332                 else if (!argv_copy(&opt_diff_argv, diff_opts))
1333                         die("Failed to format TIG_DIFF_OPTS arguments");
1334         }
1336         return OK;
1340 /*
1341  * The viewer
1342  */
1344 struct view;
1345 struct view_ops;
1347 /* The display array of active views and the index of the current view. */
1348 static struct view *display[2];
1349 static WINDOW *display_win[2];
1350 static WINDOW *display_title[2];
1351 static unsigned int current_view;
1353 #define foreach_displayed_view(view, i) \
1354         for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1356 #define displayed_views()       (display[1] != NULL ? 2 : 1)
1358 /* Current head and commit ID */
1359 static char ref_blob[SIZEOF_REF]        = "";
1360 static char ref_commit[SIZEOF_REF]      = "HEAD";
1361 static char ref_head[SIZEOF_REF]        = "HEAD";
1362 static char ref_branch[SIZEOF_REF]      = "";
1364 enum view_type {
1365         VIEW_MAIN,
1366         VIEW_DIFF,
1367         VIEW_LOG,
1368         VIEW_TREE,
1369         VIEW_BLOB,
1370         VIEW_BLAME,
1371         VIEW_BRANCH,
1372         VIEW_HELP,
1373         VIEW_PAGER,
1374         VIEW_STATUS,
1375         VIEW_STAGE,
1376 };
1378 struct view {
1379         enum view_type type;    /* View type */
1380         const char *name;       /* View name */
1381         const char *cmd_env;    /* Command line set via environment */
1382         const char *id;         /* Points to either of ref_{head,commit,blob} */
1384         struct view_ops *ops;   /* View operations */
1386         enum keymap keymap;     /* What keymap does this view have */
1387         bool git_dir;           /* Whether the view requires a git directory. */
1389         char ref[SIZEOF_REF];   /* Hovered commit reference */
1390         char vid[SIZEOF_REF];   /* View ID. Set to id member when updating. */
1392         int height, width;      /* The width and height of the main window */
1393         WINDOW *win;            /* The main window */
1395         /* Navigation */
1396         unsigned long offset;   /* Offset of the window top */
1397         unsigned long yoffset;  /* Offset from the window side. */
1398         unsigned long lineno;   /* Current line number */
1399         unsigned long p_offset; /* Previous offset of the window top */
1400         unsigned long p_yoffset;/* Previous offset from the window side */
1401         unsigned long p_lineno; /* Previous current line number */
1402         bool p_restore;         /* Should the previous position be restored. */
1404         /* Searching */
1405         char grep[SIZEOF_STR];  /* Search string */
1406         regex_t *regex;         /* Pre-compiled regexp */
1408         /* If non-NULL, points to the view that opened this view. If this view
1409          * is closed tig will switch back to the parent view. */
1410         struct view *parent;
1411         struct view *prev;
1413         /* Buffering */
1414         size_t lines;           /* Total number of lines */
1415         struct line *line;      /* Line index */
1416         unsigned int digits;    /* Number of digits in the lines member. */
1418         /* Drawing */
1419         struct line *curline;   /* Line currently being drawn. */
1420         enum line_type curtype; /* Attribute currently used for drawing. */
1421         unsigned long col;      /* Column when drawing. */
1422         bool has_scrolled;      /* View was scrolled. */
1424         /* Loading */
1425         const char **argv;      /* Shell command arguments. */
1426         const char *dir;        /* Directory from which to execute. */
1427         struct io io;
1428         struct io *pipe;
1429         time_t start_time;
1430         time_t update_secs;
1431 };
1433 struct view_ops {
1434         /* What type of content being displayed. Used in the title bar. */
1435         const char *type;
1436         /* Default command arguments. */
1437         const char **argv;
1438         /* Open and reads in all view content. */
1439         bool (*open)(struct view *view);
1440         /* Read one line; updates view->line. */
1441         bool (*read)(struct view *view, char *data);
1442         /* Draw one line; @lineno must be < view->height. */
1443         bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1444         /* Depending on view handle a special requests. */
1445         enum request (*request)(struct view *view, enum request request, struct line *line);
1446         /* Search for regexp in a line. */
1447         bool (*grep)(struct view *view, struct line *line);
1448         /* Select line */
1449         void (*select)(struct view *view, struct line *line);
1450         /* Prepare view for loading */
1451         bool (*prepare)(struct view *view);
1452 };
1454 static struct view_ops blame_ops;
1455 static struct view_ops blob_ops;
1456 static struct view_ops diff_ops;
1457 static struct view_ops help_ops;
1458 static struct view_ops log_ops;
1459 static struct view_ops main_ops;
1460 static struct view_ops pager_ops;
1461 static struct view_ops stage_ops;
1462 static struct view_ops status_ops;
1463 static struct view_ops tree_ops;
1464 static struct view_ops branch_ops;
1466 #define VIEW_STR(type, name, env, ref, ops, map, git) \
1467         { type, name, #env, ref, ops, map, git }
1469 #define VIEW_(id, name, ops, git, ref) \
1470         VIEW_STR(VIEW_##id, name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1472 static struct view views[] = {
1473         VIEW_(MAIN,   "main",   &main_ops,   TRUE,  ref_head),
1474         VIEW_(DIFF,   "diff",   &diff_ops,   TRUE,  ref_commit),
1475         VIEW_(LOG,    "log",    &log_ops,    TRUE,  ref_head),
1476         VIEW_(TREE,   "tree",   &tree_ops,   TRUE,  ref_commit),
1477         VIEW_(BLOB,   "blob",   &blob_ops,   TRUE,  ref_blob),
1478         VIEW_(BLAME,  "blame",  &blame_ops,  TRUE,  ref_commit),
1479         VIEW_(BRANCH, "branch", &branch_ops, TRUE,  ref_head),
1480         VIEW_(HELP,   "help",   &help_ops,   FALSE, ""),
1481         VIEW_(PAGER,  "pager",  &pager_ops,  FALSE, ""),
1482         VIEW_(STATUS, "status", &status_ops, TRUE,  ""),
1483         VIEW_(STAGE,  "stage",  &stage_ops,  TRUE,  ""),
1484 };
1486 #define VIEW(req)       (&views[(req) - REQ_OFFSET - 1])
1488 #define foreach_view(view, i) \
1489         for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1491 #define view_is_displayed(view) \
1492         (view == display[0] || view == display[1])
1494 static enum request
1495 view_request(struct view *view, enum request request)
1497         if (!view || !view->lines)
1498                 return request;
1499         return view->ops->request(view, request, &view->line[view->lineno]);
1503 /*
1504  * View drawing.
1505  */
1507 static inline void
1508 set_view_attr(struct view *view, enum line_type type)
1510         if (!view->curline->selected && view->curtype != type) {
1511                 (void) wattrset(view->win, get_line_attr(type));
1512                 wchgat(view->win, -1, 0, type, NULL);
1513                 view->curtype = type;
1514         }
1517 static int
1518 draw_chars(struct view *view, enum line_type type, const char *string,
1519            int max_len, bool use_tilde)
1521         static char out_buffer[BUFSIZ * 2];
1522         int len = 0;
1523         int col = 0;
1524         int trimmed = FALSE;
1525         size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1527         if (max_len <= 0)
1528                 return 0;
1530         len = utf8_length(&string, skip, &col, max_len, &trimmed, use_tilde, opt_tab_size);
1532         set_view_attr(view, type);
1533         if (len > 0) {
1534                 if (opt_iconv_out != ICONV_NONE) {
1535                         ICONV_CONST char *inbuf = (ICONV_CONST char *) string;
1536                         size_t inlen = len + 1;
1538                         char *outbuf = out_buffer;
1539                         size_t outlen = sizeof(out_buffer);
1541                         size_t ret;
1543                         ret = iconv(opt_iconv_out, &inbuf, &inlen, &outbuf, &outlen);
1544                         if (ret != (size_t) -1) {
1545                                 string = out_buffer;
1546                                 len = sizeof(out_buffer) - outlen;
1547                         }
1548                 }
1550                 waddnstr(view->win, string, len);
1552                 if (trimmed && use_tilde) {
1553                         set_view_attr(view, LINE_DELIMITER);
1554                         waddch(view->win, '~');
1555                         col++;
1556                 }
1557         }
1559         return col;
1562 static int
1563 draw_space(struct view *view, enum line_type type, int max, int spaces)
1565         static char space[] = "                    ";
1566         int col = 0;
1568         spaces = MIN(max, spaces);
1570         while (spaces > 0) {
1571                 int len = MIN(spaces, sizeof(space) - 1);
1573                 col += draw_chars(view, type, space, len, FALSE);
1574                 spaces -= len;
1575         }
1577         return col;
1580 static bool
1581 draw_text(struct view *view, enum line_type type, const char *string)
1583         char text[SIZEOF_STR];
1585         do {
1586                 size_t pos = string_expand(text, sizeof(text), string, opt_tab_size);
1588                 view->col += draw_chars(view, type, text, view->width + view->yoffset - view->col, TRUE);
1589                 string += pos;
1590         } while (*string && view->width + view->yoffset > view->col);
1592         return view->width + view->yoffset <= view->col;
1595 static bool
1596 draw_graphic(struct view *view, enum line_type type, const chtype graphic[], size_t size, bool separator)
1598         size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1599         int max = view->width + view->yoffset - view->col;
1600         int i;
1602         if (max < size)
1603                 size = max;
1605         set_view_attr(view, type);
1606         /* Using waddch() instead of waddnstr() ensures that
1607          * they'll be rendered correctly for the cursor line. */
1608         for (i = skip; i < size; i++)
1609                 waddch(view->win, graphic[i]);
1611         view->col += size;
1612         if (separator) {
1613                 if (size < max && skip <= size)
1614                         waddch(view->win, ' ');
1615                 view->col++;
1616         }
1618         return view->width + view->yoffset <= view->col;
1621 static bool
1622 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1624         int max = MIN(view->width + view->yoffset - view->col, len);
1625         int col;
1627         if (text)
1628                 col = draw_chars(view, type, text, max - 1, trim);
1629         else
1630                 col = draw_space(view, type, max - 1, max - 1);
1632         view->col += col;
1633         view->col += draw_space(view, LINE_DEFAULT, max - col, max - col);
1634         return view->width + view->yoffset <= view->col;
1637 static bool
1638 draw_date(struct view *view, struct time *time)
1640         const char *date = mkdate(time, opt_date);
1641         int cols = opt_date == DATE_SHORT ? DATE_SHORT_COLS : DATE_COLS;
1643         return draw_field(view, LINE_DATE, date, cols, FALSE);
1646 static bool
1647 draw_author(struct view *view, const char *author)
1649         bool trim = opt_author_cols == 0 || opt_author_cols > 5;
1650         bool abbreviate = opt_author == AUTHOR_ABBREVIATED || !trim;
1652         if (abbreviate && author)
1653                 author = get_author_initials(author);
1655         return draw_field(view, LINE_AUTHOR, author, opt_author_cols, trim);
1658 static bool
1659 draw_mode(struct view *view, mode_t mode)
1661         const char *str;
1663         if (S_ISDIR(mode))
1664                 str = "drwxr-xr-x";
1665         else if (S_ISLNK(mode))
1666                 str = "lrwxrwxrwx";
1667         else if (S_ISGITLINK(mode))
1668                 str = "m---------";
1669         else if (S_ISREG(mode) && mode & S_IXUSR)
1670                 str = "-rwxr-xr-x";
1671         else if (S_ISREG(mode))
1672                 str = "-rw-r--r--";
1673         else
1674                 str = "----------";
1676         return draw_field(view, LINE_MODE, str, STRING_SIZE("-rw-r--r-- "), FALSE);
1679 static bool
1680 draw_lineno(struct view *view, unsigned int lineno)
1682         char number[10];
1683         int digits3 = view->digits < 3 ? 3 : view->digits;
1684         int max = MIN(view->width + view->yoffset - view->col, digits3);
1685         char *text = NULL;
1686         chtype separator = opt_line_graphics ? ACS_VLINE : '|';
1688         lineno += view->offset + 1;
1689         if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1690                 static char fmt[] = "%1ld";
1692                 fmt[1] = '0' + (view->digits <= 9 ? digits3 : 1);
1693                 if (string_format(number, fmt, lineno))
1694                         text = number;
1695         }
1696         if (text)
1697                 view->col += draw_chars(view, LINE_LINE_NUMBER, text, max, TRUE);
1698         else
1699                 view->col += draw_space(view, LINE_LINE_NUMBER, max, digits3);
1700         return draw_graphic(view, LINE_DEFAULT, &separator, 1, TRUE);
1703 static bool
1704 draw_view_line(struct view *view, unsigned int lineno)
1706         struct line *line;
1707         bool selected = (view->offset + lineno == view->lineno);
1709         assert(view_is_displayed(view));
1711         if (view->offset + lineno >= view->lines)
1712                 return FALSE;
1714         line = &view->line[view->offset + lineno];
1716         wmove(view->win, lineno, 0);
1717         if (line->cleareol)
1718                 wclrtoeol(view->win);
1719         view->col = 0;
1720         view->curline = line;
1721         view->curtype = LINE_NONE;
1722         line->selected = FALSE;
1723         line->dirty = line->cleareol = 0;
1725         if (selected) {
1726                 set_view_attr(view, LINE_CURSOR);
1727                 line->selected = TRUE;
1728                 view->ops->select(view, line);
1729         }
1731         return view->ops->draw(view, line, lineno);
1734 static void
1735 redraw_view_dirty(struct view *view)
1737         bool dirty = FALSE;
1738         int lineno;
1740         for (lineno = 0; lineno < view->height; lineno++) {
1741                 if (view->offset + lineno >= view->lines)
1742                         break;
1743                 if (!view->line[view->offset + lineno].dirty)
1744                         continue;
1745                 dirty = TRUE;
1746                 if (!draw_view_line(view, lineno))
1747                         break;
1748         }
1750         if (!dirty)
1751                 return;
1752         wnoutrefresh(view->win);
1755 static void
1756 redraw_view_from(struct view *view, int lineno)
1758         assert(0 <= lineno && lineno < view->height);
1760         for (; lineno < view->height; lineno++) {
1761                 if (!draw_view_line(view, lineno))
1762                         break;
1763         }
1765         wnoutrefresh(view->win);
1768 static void
1769 redraw_view(struct view *view)
1771         werase(view->win);
1772         redraw_view_from(view, 0);
1776 static void
1777 update_view_title(struct view *view)
1779         char buf[SIZEOF_STR];
1780         char state[SIZEOF_STR];
1781         size_t bufpos = 0, statelen = 0;
1782         WINDOW *window = display[0] == view ? display_title[0] : display_title[1];
1784         assert(view_is_displayed(view));
1786         if (view->type != VIEW_STATUS && view->lines) {
1787                 unsigned int view_lines = view->offset + view->height;
1788                 unsigned int lines = view->lines
1789                                    ? MIN(view_lines, view->lines) * 100 / view->lines
1790                                    : 0;
1792                 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
1793                                    view->ops->type,
1794                                    view->lineno + 1,
1795                                    view->lines,
1796                                    lines);
1798         }
1800         if (view->pipe) {
1801                 time_t secs = time(NULL) - view->start_time;
1803                 /* Three git seconds are a long time ... */
1804                 if (secs > 2)
1805                         string_format_from(state, &statelen, " loading %lds", secs);
1806         }
1808         string_format_from(buf, &bufpos, "[%s]", view->name);
1809         if (*view->ref && bufpos < view->width) {
1810                 size_t refsize = strlen(view->ref);
1811                 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1813                 if (minsize < view->width)
1814                         refsize = view->width - minsize + 7;
1815                 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1816         }
1818         if (statelen && bufpos < view->width) {
1819                 string_format_from(buf, &bufpos, "%s", state);
1820         }
1822         if (view == display[current_view])
1823                 wbkgdset(window, get_line_attr(LINE_TITLE_FOCUS));
1824         else
1825                 wbkgdset(window, get_line_attr(LINE_TITLE_BLUR));
1827         mvwaddnstr(window, 0, 0, buf, bufpos);
1828         wclrtoeol(window);
1829         wnoutrefresh(window);
1832 static int
1833 apply_step(double step, int value)
1835         if (step >= 1)
1836                 return (int) step;
1837         value *= step + 0.01;
1838         return value ? value : 1;
1841 static void
1842 resize_display(void)
1844         int offset, i;
1845         struct view *base = display[0];
1846         struct view *view = display[1] ? display[1] : display[0];
1848         /* Setup window dimensions */
1850         getmaxyx(stdscr, base->height, base->width);
1852         /* Make room for the status window. */
1853         base->height -= 1;
1855         if (view != base) {
1856                 /* Horizontal split. */
1857                 view->width   = base->width;
1858                 view->height  = apply_step(opt_scale_split_view, base->height);
1859                 view->height  = MAX(view->height, MIN_VIEW_HEIGHT);
1860                 view->height  = MIN(view->height, base->height - MIN_VIEW_HEIGHT);
1861                 base->height -= view->height;
1863                 /* Make room for the title bar. */
1864                 view->height -= 1;
1865         }
1867         /* Make room for the title bar. */
1868         base->height -= 1;
1870         offset = 0;
1872         foreach_displayed_view (view, i) {
1873                 if (!display_win[i]) {
1874                         display_win[i] = newwin(view->height, view->width, offset, 0);
1875                         if (!display_win[i])
1876                                 die("Failed to create %s view", view->name);
1878                         scrollok(display_win[i], FALSE);
1880                         display_title[i] = newwin(1, view->width, offset + view->height, 0);
1881                         if (!display_title[i])
1882                                 die("Failed to create title window");
1884                 } else {
1885                         wresize(display_win[i], view->height, view->width);
1886                         mvwin(display_win[i],   offset, 0);
1887                         mvwin(display_title[i], offset + view->height, 0);
1888                 }
1890                 view->win = display_win[i];
1892                 offset += view->height + 1;
1893         }
1896 static void
1897 redraw_display(bool clear)
1899         struct view *view;
1900         int i;
1902         foreach_displayed_view (view, i) {
1903                 if (clear)
1904                         wclear(view->win);
1905                 redraw_view(view);
1906                 update_view_title(view);
1907         }
1911 /*
1912  * Option management
1913  */
1915 #define TOGGLE_MENU \
1916         TOGGLE_(LINENO,    '.', "line numbers",      &opt_line_number, NULL) \
1917         TOGGLE_(DATE,      'D', "dates",             &opt_date,   date_map) \
1918         TOGGLE_(AUTHOR,    'A', "author names",      &opt_author, author_map) \
1919         TOGGLE_(GRAPHIC,   '~', "graphics",          &opt_line_graphics, graphic_map) \
1920         TOGGLE_(REV_GRAPH, 'g', "revision graph",    &opt_rev_graph, NULL) \
1921         TOGGLE_(REFS,      'F', "reference display", &opt_show_refs, NULL)
1923 static void
1924 toggle_option(enum request request)
1926         const struct {
1927                 enum request request;
1928                 const struct enum_map *map;
1929                 size_t map_size;
1930         } data[] = {            
1931 #define TOGGLE_(id, key, help, value, map) { REQ_TOGGLE_ ## id, map, ARRAY_SIZE(map) },
1932                 TOGGLE_MENU
1933 #undef  TOGGLE_
1934         };
1935         const struct menu_item menu[] = {
1936 #define TOGGLE_(id, key, help, value, map) { key, help, value },
1937                 TOGGLE_MENU
1938 #undef  TOGGLE_
1939                 { 0 }
1940         };
1941         int i = 0;
1943         if (request == REQ_OPTIONS) {
1944                 if (!prompt_menu("Toggle option", menu, &i))
1945                         return;
1946         } else {
1947                 while (i < ARRAY_SIZE(data) && data[i].request != request)
1948                         i++;
1949                 if (i >= ARRAY_SIZE(data))
1950                         die("Invalid request (%d)", request);
1951         }
1953         if (data[i].map != NULL) {
1954                 unsigned int *opt = menu[i].data;
1956                 *opt = (*opt + 1) % data[i].map_size;
1957                 redraw_display(FALSE);
1958                 report("Displaying %s %s", enum_name(data[i].map[*opt]), menu[i].text);
1960         } else {
1961                 bool *option = menu[i].data;
1963                 *option = !*option;
1964                 redraw_display(FALSE);
1965                 report("%sabling %s", *option ? "En" : "Dis", menu[i].text);
1966         }
1969 static void
1970 maximize_view(struct view *view)
1972         memset(display, 0, sizeof(display));
1973         current_view = 0;
1974         display[current_view] = view;
1975         resize_display();
1976         redraw_display(FALSE);
1977         report("");
1981 /*
1982  * Navigation
1983  */
1985 static bool
1986 goto_view_line(struct view *view, unsigned long offset, unsigned long lineno)
1988         if (lineno >= view->lines)
1989                 lineno = view->lines > 0 ? view->lines - 1 : 0;
1991         if (offset > lineno || offset + view->height <= lineno) {
1992                 unsigned long half = view->height / 2;
1994                 if (lineno > half)
1995                         offset = lineno - half;
1996                 else
1997                         offset = 0;
1998         }
2000         if (offset != view->offset || lineno != view->lineno) {
2001                 view->offset = offset;
2002                 view->lineno = lineno;
2003                 return TRUE;
2004         }
2006         return FALSE;
2009 /* Scrolling backend */
2010 static void
2011 do_scroll_view(struct view *view, int lines)
2013         bool redraw_current_line = FALSE;
2015         /* The rendering expects the new offset. */
2016         view->offset += lines;
2018         assert(0 <= view->offset && view->offset < view->lines);
2019         assert(lines);
2021         /* Move current line into the view. */
2022         if (view->lineno < view->offset) {
2023                 view->lineno = view->offset;
2024                 redraw_current_line = TRUE;
2025         } else if (view->lineno >= view->offset + view->height) {
2026                 view->lineno = view->offset + view->height - 1;
2027                 redraw_current_line = TRUE;
2028         }
2030         assert(view->offset <= view->lineno && view->lineno < view->lines);
2032         /* Redraw the whole screen if scrolling is pointless. */
2033         if (view->height < ABS(lines)) {
2034                 redraw_view(view);
2036         } else {
2037                 int line = lines > 0 ? view->height - lines : 0;
2038                 int end = line + ABS(lines);
2040                 scrollok(view->win, TRUE);
2041                 wscrl(view->win, lines);
2042                 scrollok(view->win, FALSE);
2044                 while (line < end && draw_view_line(view, line))
2045                         line++;
2047                 if (redraw_current_line)
2048                         draw_view_line(view, view->lineno - view->offset);
2049                 wnoutrefresh(view->win);
2050         }
2052         view->has_scrolled = TRUE;
2053         report("");
2056 /* Scroll frontend */
2057 static void
2058 scroll_view(struct view *view, enum request request)
2060         int lines = 1;
2062         assert(view_is_displayed(view));
2064         switch (request) {
2065         case REQ_SCROLL_FIRST_COL:
2066                 view->yoffset = 0;
2067                 redraw_view_from(view, 0);
2068                 report("");
2069                 return;
2070         case REQ_SCROLL_LEFT:
2071                 if (view->yoffset == 0) {
2072                         report("Cannot scroll beyond the first column");
2073                         return;
2074                 }
2075                 if (view->yoffset <= apply_step(opt_hscroll, view->width))
2076                         view->yoffset = 0;
2077                 else
2078                         view->yoffset -= apply_step(opt_hscroll, view->width);
2079                 redraw_view_from(view, 0);
2080                 report("");
2081                 return;
2082         case REQ_SCROLL_RIGHT:
2083                 view->yoffset += apply_step(opt_hscroll, view->width);
2084                 redraw_view(view);
2085                 report("");
2086                 return;
2087         case REQ_SCROLL_PAGE_DOWN:
2088                 lines = view->height;
2089         case REQ_SCROLL_LINE_DOWN:
2090                 if (view->offset + lines > view->lines)
2091                         lines = view->lines - view->offset;
2093                 if (lines == 0 || view->offset + view->height >= view->lines) {
2094                         report("Cannot scroll beyond the last line");
2095                         return;
2096                 }
2097                 break;
2099         case REQ_SCROLL_PAGE_UP:
2100                 lines = view->height;
2101         case REQ_SCROLL_LINE_UP:
2102                 if (lines > view->offset)
2103                         lines = view->offset;
2105                 if (lines == 0) {
2106                         report("Cannot scroll beyond the first line");
2107                         return;
2108                 }
2110                 lines = -lines;
2111                 break;
2113         default:
2114                 die("request %d not handled in switch", request);
2115         }
2117         do_scroll_view(view, lines);
2120 /* Cursor moving */
2121 static void
2122 move_view(struct view *view, enum request request)
2124         int scroll_steps = 0;
2125         int steps;
2127         switch (request) {
2128         case REQ_MOVE_FIRST_LINE:
2129                 steps = -view->lineno;
2130                 break;
2132         case REQ_MOVE_LAST_LINE:
2133                 steps = view->lines - view->lineno - 1;
2134                 break;
2136         case REQ_MOVE_PAGE_UP:
2137                 steps = view->height > view->lineno
2138                       ? -view->lineno : -view->height;
2139                 break;
2141         case REQ_MOVE_PAGE_DOWN:
2142                 steps = view->lineno + view->height >= view->lines
2143                       ? view->lines - view->lineno - 1 : view->height;
2144                 break;
2146         case REQ_MOVE_UP:
2147                 steps = -1;
2148                 break;
2150         case REQ_MOVE_DOWN:
2151                 steps = 1;
2152                 break;
2154         default:
2155                 die("request %d not handled in switch", request);
2156         }
2158         if (steps <= 0 && view->lineno == 0) {
2159                 report("Cannot move beyond the first line");
2160                 return;
2162         } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2163                 report("Cannot move beyond the last line");
2164                 return;
2165         }
2167         /* Move the current line */
2168         view->lineno += steps;
2169         assert(0 <= view->lineno && view->lineno < view->lines);
2171         /* Check whether the view needs to be scrolled */
2172         if (view->lineno < view->offset ||
2173             view->lineno >= view->offset + view->height) {
2174                 scroll_steps = steps;
2175                 if (steps < 0 && -steps > view->offset) {
2176                         scroll_steps = -view->offset;
2178                 } else if (steps > 0) {
2179                         if (view->lineno == view->lines - 1 &&
2180                             view->lines > view->height) {
2181                                 scroll_steps = view->lines - view->offset - 1;
2182                                 if (scroll_steps >= view->height)
2183                                         scroll_steps -= view->height - 1;
2184                         }
2185                 }
2186         }
2188         if (!view_is_displayed(view)) {
2189                 view->offset += scroll_steps;
2190                 assert(0 <= view->offset && view->offset < view->lines);
2191                 view->ops->select(view, &view->line[view->lineno]);
2192                 return;
2193         }
2195         /* Repaint the old "current" line if we be scrolling */
2196         if (ABS(steps) < view->height)
2197                 draw_view_line(view, view->lineno - steps - view->offset);
2199         if (scroll_steps) {
2200                 do_scroll_view(view, scroll_steps);
2201                 return;
2202         }
2204         /* Draw the current line */
2205         draw_view_line(view, view->lineno - view->offset);
2207         wnoutrefresh(view->win);
2208         report("");
2212 /*
2213  * Searching
2214  */
2216 static void search_view(struct view *view, enum request request);
2218 static bool
2219 grep_text(struct view *view, const char *text[])
2221         regmatch_t pmatch;
2222         size_t i;
2224         for (i = 0; text[i]; i++)
2225                 if (*text[i] &&
2226                     regexec(view->regex, text[i], 1, &pmatch, 0) != REG_NOMATCH)
2227                         return TRUE;
2228         return FALSE;
2231 static void
2232 select_view_line(struct view *view, unsigned long lineno)
2234         unsigned long old_lineno = view->lineno;
2235         unsigned long old_offset = view->offset;
2237         if (goto_view_line(view, view->offset, lineno)) {
2238                 if (view_is_displayed(view)) {
2239                         if (old_offset != view->offset) {
2240                                 redraw_view(view);
2241                         } else {
2242                                 draw_view_line(view, old_lineno - view->offset);
2243                                 draw_view_line(view, view->lineno - view->offset);
2244                                 wnoutrefresh(view->win);
2245                         }
2246                 } else {
2247                         view->ops->select(view, &view->line[view->lineno]);
2248                 }
2249         }
2252 static void
2253 find_next(struct view *view, enum request request)
2255         unsigned long lineno = view->lineno;
2256         int direction;
2258         if (!*view->grep) {
2259                 if (!*opt_search)
2260                         report("No previous search");
2261                 else
2262                         search_view(view, request);
2263                 return;
2264         }
2266         switch (request) {
2267         case REQ_SEARCH:
2268         case REQ_FIND_NEXT:
2269                 direction = 1;
2270                 break;
2272         case REQ_SEARCH_BACK:
2273         case REQ_FIND_PREV:
2274                 direction = -1;
2275                 break;
2277         default:
2278                 return;
2279         }
2281         if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2282                 lineno += direction;
2284         /* Note, lineno is unsigned long so will wrap around in which case it
2285          * will become bigger than view->lines. */
2286         for (; lineno < view->lines; lineno += direction) {
2287                 if (view->ops->grep(view, &view->line[lineno])) {
2288                         select_view_line(view, lineno);
2289                         report("Line %ld matches '%s'", lineno + 1, view->grep);
2290                         return;
2291                 }
2292         }
2294         report("No match found for '%s'", view->grep);
2297 static void
2298 search_view(struct view *view, enum request request)
2300         int regex_err;
2302         if (view->regex) {
2303                 regfree(view->regex);
2304                 *view->grep = 0;
2305         } else {
2306                 view->regex = calloc(1, sizeof(*view->regex));
2307                 if (!view->regex)
2308                         return;
2309         }
2311         regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2312         if (regex_err != 0) {
2313                 char buf[SIZEOF_STR] = "unknown error";
2315                 regerror(regex_err, view->regex, buf, sizeof(buf));
2316                 report("Search failed: %s", buf);
2317                 return;
2318         }
2320         string_copy(view->grep, opt_search);
2322         find_next(view, request);
2325 /*
2326  * Incremental updating
2327  */
2329 static void
2330 reset_view(struct view *view)
2332         int i;
2334         for (i = 0; i < view->lines; i++)
2335                 free(view->line[i].data);
2336         free(view->line);
2338         view->p_offset = view->offset;
2339         view->p_yoffset = view->yoffset;
2340         view->p_lineno = view->lineno;
2342         view->line = NULL;
2343         view->offset = 0;
2344         view->yoffset = 0;
2345         view->lines  = 0;
2346         view->lineno = 0;
2347         view->vid[0] = 0;
2348         view->update_secs = 0;
2351 static const char *
2352 format_arg(const char *name)
2354         static struct {
2355                 const char *name;
2356                 size_t namelen;
2357                 const char *value;
2358                 const char *value_if_empty;
2359         } vars[] = {
2360 #define FORMAT_VAR(name, value, value_if_empty) \
2361         { name, STRING_SIZE(name), value, value_if_empty }
2362                 FORMAT_VAR("%(directory)",      opt_path,       "."),
2363                 FORMAT_VAR("%(file)",           opt_file,       ""),
2364                 FORMAT_VAR("%(ref)",            opt_ref,        "HEAD"),
2365                 FORMAT_VAR("%(head)",           ref_head,       ""),
2366                 FORMAT_VAR("%(commit)",         ref_commit,     ""),
2367                 FORMAT_VAR("%(blob)",           ref_blob,       ""),
2368                 FORMAT_VAR("%(branch)",         ref_branch,     ""),
2369         };
2370         int i;
2372         for (i = 0; i < ARRAY_SIZE(vars); i++)
2373                 if (!strncmp(name, vars[i].name, vars[i].namelen))
2374                         return *vars[i].value ? vars[i].value : vars[i].value_if_empty;
2376         report("Unknown replacement: `%s`", name);
2377         return NULL;
2380 static bool
2381 format_argv(const char ***dst_argv, const char *src_argv[], bool replace, bool first)
2383         char buf[SIZEOF_STR];
2384         int argc;
2386         argv_free(*dst_argv);
2388         for (argc = 0; src_argv[argc]; argc++) {
2389                 const char *arg = src_argv[argc];
2390                 size_t bufpos = 0;
2392                 if (!strcmp(arg, "%(fileargs)")) {
2393                         if (!argv_append_array(dst_argv, opt_file_argv))
2394                                 break;
2395                         continue;
2397                 } else if (!strcmp(arg, "%(diffargs)")) {
2398                         if (!argv_append_array(dst_argv, opt_diff_argv))
2399                                 break;
2400                         continue;
2402                 } else if (!strcmp(arg, "%(blameargs)")) {
2403                         if (!argv_append_array(dst_argv, opt_blame_argv))
2404                                 break;
2405                         continue;
2407                 } else if (!strcmp(arg, "%(revargs)") ||
2408                            (first && !strcmp(arg, "%(commit)"))) {
2409                         if (!argv_append_array(dst_argv, opt_rev_argv))
2410                                 break;
2411                         continue;
2412                 }
2414                 while (arg) {
2415                         char *next = strstr(arg, "%(");
2416                         int len = next - arg;
2417                         const char *value;
2419                         if (!next || !replace) {
2420                                 len = strlen(arg);
2421                                 value = "";
2423                         } else {
2424                                 value = format_arg(next);
2426                                 if (!value) {
2427                                         return FALSE;
2428                                 }
2429                         }
2431                         if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2432                                 return FALSE;
2434                         arg = next && replace ? strchr(next, ')') + 1 : NULL;
2435                 }
2437                 if (!argv_append(dst_argv, buf))
2438                         break;
2439         }
2441         return src_argv[argc] == NULL;
2444 static bool
2445 restore_view_position(struct view *view)
2447         if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
2448                 return FALSE;
2450         /* Changing the view position cancels the restoring. */
2451         /* FIXME: Changing back to the first line is not detected. */
2452         if (view->offset != 0 || view->lineno != 0) {
2453                 view->p_restore = FALSE;
2454                 return FALSE;
2455         }
2457         if (goto_view_line(view, view->p_offset, view->p_lineno) &&
2458             view_is_displayed(view))
2459                 werase(view->win);
2461         view->yoffset = view->p_yoffset;
2462         view->p_restore = FALSE;
2464         return TRUE;
2467 static void
2468 end_update(struct view *view, bool force)
2470         if (!view->pipe)
2471                 return;
2472         while (!view->ops->read(view, NULL))
2473                 if (!force)
2474                         return;
2475         if (force)
2476                 io_kill(view->pipe);
2477         io_done(view->pipe);
2478         view->pipe = NULL;
2481 static void
2482 setup_update(struct view *view, const char *vid)
2484         reset_view(view);
2485         string_copy_rev(view->vid, vid);
2486         view->pipe = &view->io;
2487         view->start_time = time(NULL);
2490 static bool
2491 prepare_io(struct view *view, const char *dir, const char *argv[], bool replace)
2493         view->dir = dir;
2494         return format_argv(&view->argv, argv, replace, !view->prev);
2497 static bool
2498 prepare_update(struct view *view, const char *argv[], const char *dir)
2500         if (view->pipe)
2501                 end_update(view, TRUE);
2502         return prepare_io(view, dir, argv, FALSE);
2505 static bool
2506 start_update(struct view *view, const char **argv, const char *dir)
2508         if (view->pipe)
2509                 io_done(view->pipe);
2510         return prepare_io(view, dir, argv, FALSE) &&
2511                io_run(&view->io, IO_RD, dir, view->argv);
2514 static bool
2515 prepare_update_file(struct view *view, const char *name)
2517         if (view->pipe)
2518                 end_update(view, TRUE);
2519         argv_free(view->argv);
2520         return io_open(&view->io, "%s/%s", opt_cdup[0] ? opt_cdup : ".", name);
2523 static bool
2524 begin_update(struct view *view, bool refresh)
2526         if (view->pipe)
2527                 end_update(view, TRUE);
2529         if (!refresh) {
2530                 if (view->ops->prepare) {
2531                         if (!view->ops->prepare(view))
2532                                 return FALSE;
2533                 } else if (!prepare_io(view, NULL, view->ops->argv, TRUE)) {
2534                         return FALSE;
2535                 }
2537                 /* Put the current ref_* value to the view title ref
2538                  * member. This is needed by the blob view. Most other
2539                  * views sets it automatically after loading because the
2540                  * first line is a commit line. */
2541                 string_copy_rev(view->ref, view->id);
2542         }
2544         if (view->argv && view->argv[0] &&
2545             !io_run(&view->io, IO_RD, view->dir, view->argv))
2546                 return FALSE;
2548         setup_update(view, view->id);
2550         return TRUE;
2553 static bool
2554 update_view(struct view *view)
2556         char out_buffer[BUFSIZ * 2];
2557         char *line;
2558         /* Clear the view and redraw everything since the tree sorting
2559          * might have rearranged things. */
2560         bool redraw = view->lines == 0;
2561         bool can_read = TRUE;
2563         if (!view->pipe)
2564                 return TRUE;
2566         if (!io_can_read(view->pipe, FALSE)) {
2567                 if (view->lines == 0 && view_is_displayed(view)) {
2568                         time_t secs = time(NULL) - view->start_time;
2570                         if (secs > 1 && secs > view->update_secs) {
2571                                 if (view->update_secs == 0)
2572                                         redraw_view(view);
2573                                 update_view_title(view);
2574                                 view->update_secs = secs;
2575                         }
2576                 }
2577                 return TRUE;
2578         }
2580         for (; (line = io_get(view->pipe, '\n', can_read)); can_read = FALSE) {
2581                 if (opt_iconv_in != ICONV_NONE) {
2582                         ICONV_CONST char *inbuf = line;
2583                         size_t inlen = strlen(line) + 1;
2585                         char *outbuf = out_buffer;
2586                         size_t outlen = sizeof(out_buffer);
2588                         size_t ret;
2590                         ret = iconv(opt_iconv_in, &inbuf, &inlen, &outbuf, &outlen);
2591                         if (ret != (size_t) -1)
2592                                 line = out_buffer;
2593                 }
2595                 if (!view->ops->read(view, line)) {
2596                         report("Allocation failure");
2597                         end_update(view, TRUE);
2598                         return FALSE;
2599                 }
2600         }
2602         {
2603                 unsigned long lines = view->lines;
2604                 int digits;
2606                 for (digits = 0; lines; digits++)
2607                         lines /= 10;
2609                 /* Keep the displayed view in sync with line number scaling. */
2610                 if (digits != view->digits) {
2611                         view->digits = digits;
2612                         if (opt_line_number || view->type == VIEW_BLAME)
2613                                 redraw = TRUE;
2614                 }
2615         }
2617         if (io_error(view->pipe)) {
2618                 report("Failed to read: %s", io_strerror(view->pipe));
2619                 end_update(view, TRUE);
2621         } else if (io_eof(view->pipe)) {
2622                 if (view_is_displayed(view))
2623                         report("");
2624                 end_update(view, FALSE);
2625         }
2627         if (restore_view_position(view))
2628                 redraw = TRUE;
2630         if (!view_is_displayed(view))
2631                 return TRUE;
2633         if (redraw)
2634                 redraw_view_from(view, 0);
2635         else
2636                 redraw_view_dirty(view);
2638         /* Update the title _after_ the redraw so that if the redraw picks up a
2639          * commit reference in view->ref it'll be available here. */
2640         update_view_title(view);
2641         return TRUE;
2644 DEFINE_ALLOCATOR(realloc_lines, struct line, 256)
2646 static struct line *
2647 add_line_data(struct view *view, void *data, enum line_type type)
2649         struct line *line;
2651         if (!realloc_lines(&view->line, view->lines, 1))
2652                 return NULL;
2654         line = &view->line[view->lines++];
2655         memset(line, 0, sizeof(*line));
2656         line->type = type;
2657         line->data = data;
2658         line->dirty = 1;
2660         return line;
2663 static struct line *
2664 add_line_text(struct view *view, const char *text, enum line_type type)
2666         char *data = text ? strdup(text) : NULL;
2668         return data ? add_line_data(view, data, type) : NULL;
2671 static struct line *
2672 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
2674         char buf[SIZEOF_STR];
2675         va_list args;
2677         va_start(args, fmt);
2678         if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2679                 buf[0] = 0;
2680         va_end(args);
2682         return buf[0] ? add_line_text(view, buf, type) : NULL;
2685 /*
2686  * View opening
2687  */
2689 enum open_flags {
2690         OPEN_DEFAULT = 0,       /* Use default view switching. */
2691         OPEN_SPLIT = 1,         /* Split current view. */
2692         OPEN_RELOAD = 4,        /* Reload view even if it is the current. */
2693         OPEN_REFRESH = 16,      /* Refresh view using previous command. */
2694         OPEN_PREPARED = 32,     /* Open already prepared command. */
2695 };
2697 static void
2698 open_view(struct view *prev, enum request request, enum open_flags flags)
2700         bool split = !!(flags & OPEN_SPLIT);
2701         bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2702         bool nomaximize = !!(flags & OPEN_REFRESH);
2703         struct view *view = VIEW(request);
2704         int nviews = displayed_views();
2705         struct view *base_view = display[0];
2707         if (view == prev && nviews == 1 && !reload) {
2708                 report("Already in %s view", view->name);
2709                 return;
2710         }
2712         if (view->git_dir && !opt_git_dir[0]) {
2713                 report("The %s view is disabled in pager view", view->name);
2714                 return;
2715         }
2717         if (split) {
2718                 display[1] = view;
2719                 current_view = 1;
2720                 view->parent = prev;
2721         } else if (!nomaximize) {
2722                 /* Maximize the current view. */
2723                 memset(display, 0, sizeof(display));
2724                 current_view = 0;
2725                 display[current_view] = view;
2726         }
2728         /* No prev signals that this is the first loaded view. */
2729         if (prev && view != prev) {
2730                 view->prev = prev;
2731         }
2733         /* Resize the view when switching between split- and full-screen,
2734          * or when switching between two different full-screen views. */
2735         if (nviews != displayed_views() ||
2736             (nviews == 1 && base_view != display[0]))
2737                 resize_display();
2739         if (view->ops->open) {
2740                 if (view->pipe)
2741                         end_update(view, TRUE);
2742                 if (!view->ops->open(view)) {
2743                         report("Failed to load %s view", view->name);
2744                         return;
2745                 }
2746                 restore_view_position(view);
2748         } else if ((reload || strcmp(view->vid, view->id)) &&
2749                    !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
2750                 report("Failed to load %s view", view->name);
2751                 return;
2752         }
2754         if (split && prev->lineno - prev->offset >= prev->height) {
2755                 /* Take the title line into account. */
2756                 int lines = prev->lineno - prev->offset - prev->height + 1;
2758                 /* Scroll the view that was split if the current line is
2759                  * outside the new limited view. */
2760                 do_scroll_view(prev, lines);
2761         }
2763         if (prev && view != prev && split && view_is_displayed(prev)) {
2764                 /* "Blur" the previous view. */
2765                 update_view_title(prev);
2766         }
2768         if (view->pipe && view->lines == 0) {
2769                 /* Clear the old view and let the incremental updating refill
2770                  * the screen. */
2771                 werase(view->win);
2772                 view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
2773                 report("");
2774         } else if (view_is_displayed(view)) {
2775                 redraw_view(view);
2776                 report("");
2777         }
2780 static void
2781 open_external_viewer(const char *argv[], const char *dir)
2783         def_prog_mode();           /* save current tty modes */
2784         endwin();                  /* restore original tty modes */
2785         io_run_fg(argv, dir);
2786         fprintf(stderr, "Press Enter to continue");
2787         getc(opt_tty);
2788         reset_prog_mode();
2789         redraw_display(TRUE);
2792 static void
2793 open_mergetool(const char *file)
2795         const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
2797         open_external_viewer(mergetool_argv, opt_cdup);
2800 static void
2801 open_editor(const char *file)
2803         const char *editor_argv[] = { "vi", file, NULL };
2804         const char *editor;
2806         editor = getenv("GIT_EDITOR");
2807         if (!editor && *opt_editor)
2808                 editor = opt_editor;
2809         if (!editor)
2810                 editor = getenv("VISUAL");
2811         if (!editor)
2812                 editor = getenv("EDITOR");
2813         if (!editor)
2814                 editor = "vi";
2816         editor_argv[0] = editor;
2817         open_external_viewer(editor_argv, opt_cdup);
2820 static void
2821 open_run_request(enum request request)
2823         struct run_request *req = get_run_request(request);
2824         const char **argv = NULL;
2826         if (!req) {
2827                 report("Unknown run request");
2828                 return;
2829         }
2831         if (format_argv(&argv, req->argv, TRUE, FALSE))
2832                 open_external_viewer(argv, NULL);
2833         if (argv)
2834                 argv_free(argv);
2835         free(argv);
2838 /*
2839  * User request switch noodle
2840  */
2842 static int
2843 view_driver(struct view *view, enum request request)
2845         int i;
2847         if (request == REQ_NONE)
2848                 return TRUE;
2850         if (request > REQ_NONE) {
2851                 open_run_request(request);
2852                 view_request(view, REQ_REFRESH);
2853                 return TRUE;
2854         }
2856         request = view_request(view, request);
2857         if (request == REQ_NONE)
2858                 return TRUE;
2860         switch (request) {
2861         case REQ_MOVE_UP:
2862         case REQ_MOVE_DOWN:
2863         case REQ_MOVE_PAGE_UP:
2864         case REQ_MOVE_PAGE_DOWN:
2865         case REQ_MOVE_FIRST_LINE:
2866         case REQ_MOVE_LAST_LINE:
2867                 move_view(view, request);
2868                 break;
2870         case REQ_SCROLL_FIRST_COL:
2871         case REQ_SCROLL_LEFT:
2872         case REQ_SCROLL_RIGHT:
2873         case REQ_SCROLL_LINE_DOWN:
2874         case REQ_SCROLL_LINE_UP:
2875         case REQ_SCROLL_PAGE_DOWN:
2876         case REQ_SCROLL_PAGE_UP:
2877                 scroll_view(view, request);
2878                 break;
2880         case REQ_VIEW_BLAME:
2881                 if (!opt_file[0]) {
2882                         report("No file chosen, press %s to open tree view",
2883                                get_key(view->keymap, REQ_VIEW_TREE));
2884                         break;
2885                 }
2886                 open_view(view, request, OPEN_DEFAULT);
2887                 break;
2889         case REQ_VIEW_BLOB:
2890                 if (!ref_blob[0]) {
2891                         report("No file chosen, press %s to open tree view",
2892                                get_key(view->keymap, REQ_VIEW_TREE));
2893                         break;
2894                 }
2895                 open_view(view, request, OPEN_DEFAULT);
2896                 break;
2898         case REQ_VIEW_PAGER:
2899                 if (view == NULL) {
2900                         if (!io_open(&VIEW(REQ_VIEW_PAGER)->io, ""))
2901                                 die("Failed to open stdin");
2902                         open_view(view, request, OPEN_PREPARED);
2903                         break;
2904                 }
2906                 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2907                         report("No pager content, press %s to run command from prompt",
2908                                get_key(view->keymap, REQ_PROMPT));
2909                         break;
2910                 }
2911                 open_view(view, request, OPEN_DEFAULT);
2912                 break;
2914         case REQ_VIEW_STAGE:
2915                 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2916                         report("No stage content, press %s to open the status view and choose file",
2917                                get_key(view->keymap, REQ_VIEW_STATUS));
2918                         break;
2919                 }
2920                 open_view(view, request, OPEN_DEFAULT);
2921                 break;
2923         case REQ_VIEW_STATUS:
2924                 if (opt_is_inside_work_tree == FALSE) {
2925                         report("The status view requires a working tree");
2926                         break;
2927                 }
2928                 open_view(view, request, OPEN_DEFAULT);
2929                 break;
2931         case REQ_VIEW_MAIN:
2932         case REQ_VIEW_DIFF:
2933         case REQ_VIEW_LOG:
2934         case REQ_VIEW_TREE:
2935         case REQ_VIEW_HELP:
2936         case REQ_VIEW_BRANCH:
2937                 open_view(view, request, OPEN_DEFAULT);
2938                 break;
2940         case REQ_NEXT:
2941         case REQ_PREVIOUS:
2942                 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2944                 if (view->parent) {
2945                         int line;
2947                         view = view->parent;
2948                         line = view->lineno;
2949                         move_view(view, request);
2950                         if (view_is_displayed(view))
2951                                 update_view_title(view);
2952                         if (line != view->lineno)
2953                                 view_request(view, REQ_ENTER);
2954                 } else {
2955                         move_view(view, request);
2956                 }
2957                 break;
2959         case REQ_VIEW_NEXT:
2960         {
2961                 int nviews = displayed_views();
2962                 int next_view = (current_view + 1) % nviews;
2964                 if (next_view == current_view) {
2965                         report("Only one view is displayed");
2966                         break;
2967                 }
2969                 current_view = next_view;
2970                 /* Blur out the title of the previous view. */
2971                 update_view_title(view);
2972                 report("");
2973                 break;
2974         }
2975         case REQ_REFRESH:
2976                 report("Refreshing is not yet supported for the %s view", view->name);
2977                 break;
2979         case REQ_MAXIMIZE:
2980                 if (displayed_views() == 2)
2981                         maximize_view(view);
2982                 break;
2984         case REQ_OPTIONS:
2985         case REQ_TOGGLE_LINENO:
2986         case REQ_TOGGLE_DATE:
2987         case REQ_TOGGLE_AUTHOR:
2988         case REQ_TOGGLE_GRAPHIC:
2989         case REQ_TOGGLE_REV_GRAPH:
2990         case REQ_TOGGLE_REFS:
2991                 toggle_option(request);
2992                 break;
2994         case REQ_TOGGLE_SORT_FIELD:
2995         case REQ_TOGGLE_SORT_ORDER:
2996                 report("Sorting is not yet supported for the %s view", view->name);
2997                 break;
2999         case REQ_SEARCH:
3000         case REQ_SEARCH_BACK:
3001                 search_view(view, request);
3002                 break;
3004         case REQ_FIND_NEXT:
3005         case REQ_FIND_PREV:
3006                 find_next(view, request);
3007                 break;
3009         case REQ_STOP_LOADING:
3010                 foreach_view(view, i) {
3011                         if (view->pipe)
3012                                 report("Stopped loading the %s view", view->name),
3013                         end_update(view, TRUE);
3014                 }
3015                 break;
3017         case REQ_SHOW_VERSION:
3018                 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3019                 return TRUE;
3021         case REQ_SCREEN_REDRAW:
3022                 redraw_display(TRUE);
3023                 break;
3025         case REQ_EDIT:
3026                 report("Nothing to edit");
3027                 break;
3029         case REQ_ENTER:
3030                 report("Nothing to enter");
3031                 break;
3033         case REQ_VIEW_CLOSE:
3034                 /* XXX: Mark closed views by letting view->prev point to the
3035                  * view itself. Parents to closed view should never be
3036                  * followed. */
3037                 if (view->prev && view->prev != view) {
3038                         maximize_view(view->prev);
3039                         view->prev = view;
3040                         break;
3041                 }
3042                 /* Fall-through */
3043         case REQ_QUIT:
3044                 return FALSE;
3046         default:
3047                 report("Unknown key, press %s for help",
3048                        get_key(view->keymap, REQ_VIEW_HELP));
3049                 return TRUE;
3050         }
3052         return TRUE;
3056 /*
3057  * View backend utilities
3058  */
3060 enum sort_field {
3061         ORDERBY_NAME,
3062         ORDERBY_DATE,
3063         ORDERBY_AUTHOR,
3064 };
3066 struct sort_state {
3067         const enum sort_field *fields;
3068         size_t size, current;
3069         bool reverse;
3070 };
3072 #define SORT_STATE(fields) { fields, ARRAY_SIZE(fields), 0 }
3073 #define get_sort_field(state) ((state).fields[(state).current])
3074 #define sort_order(state, result) ((state).reverse ? -(result) : (result))
3076 static void
3077 sort_view(struct view *view, enum request request, struct sort_state *state,
3078           int (*compare)(const void *, const void *))
3080         switch (request) {
3081         case REQ_TOGGLE_SORT_FIELD:
3082                 state->current = (state->current + 1) % state->size;
3083                 break;
3085         case REQ_TOGGLE_SORT_ORDER:
3086                 state->reverse = !state->reverse;
3087                 break;
3088         default:
3089                 die("Not a sort request");
3090         }
3092         qsort(view->line, view->lines, sizeof(*view->line), compare);
3093         redraw_view(view);
3096 DEFINE_ALLOCATOR(realloc_authors, const char *, 256)
3098 /* Small author cache to reduce memory consumption. It uses binary
3099  * search to lookup or find place to position new entries. No entries
3100  * are ever freed. */
3101 static const char *
3102 get_author(const char *name)
3104         static const char **authors;
3105         static size_t authors_size;
3106         int from = 0, to = authors_size - 1;
3108         while (from <= to) {
3109                 size_t pos = (to + from) / 2;
3110                 int cmp = strcmp(name, authors[pos]);
3112                 if (!cmp)
3113                         return authors[pos];
3115                 if (cmp < 0)
3116                         to = pos - 1;
3117                 else
3118                         from = pos + 1;
3119         }
3121         if (!realloc_authors(&authors, authors_size, 1))
3122                 return NULL;
3123         name = strdup(name);
3124         if (!name)
3125                 return NULL;
3127         memmove(authors + from + 1, authors + from, (authors_size - from) * sizeof(*authors));
3128         authors[from] = name;
3129         authors_size++;
3131         return name;
3134 static void
3135 parse_timesec(struct time *time, const char *sec)
3137         time->sec = (time_t) atol(sec);
3140 static void
3141 parse_timezone(struct time *time, const char *zone)
3143         long tz;
3145         tz  = ('0' - zone[1]) * 60 * 60 * 10;
3146         tz += ('0' - zone[2]) * 60 * 60;
3147         tz += ('0' - zone[3]) * 60 * 10;
3148         tz += ('0' - zone[4]) * 60;
3150         if (zone[0] == '-')
3151                 tz = -tz;
3153         time->tz = tz;
3154         time->sec -= tz;
3157 /* Parse author lines where the name may be empty:
3158  *      author  <email@address.tld> 1138474660 +0100
3159  */
3160 static void
3161 parse_author_line(char *ident, const char **author, struct time *time)
3163         char *nameend = strchr(ident, '<');
3164         char *emailend = strchr(ident, '>');
3166         if (nameend && emailend)
3167                 *nameend = *emailend = 0;
3168         ident = chomp_string(ident);
3169         if (!*ident) {
3170                 if (nameend)
3171                         ident = chomp_string(nameend + 1);
3172                 if (!*ident)
3173                         ident = "Unknown";
3174         }
3176         *author = get_author(ident);
3178         /* Parse epoch and timezone */
3179         if (emailend && emailend[1] == ' ') {
3180                 char *secs = emailend + 2;
3181                 char *zone = strchr(secs, ' ');
3183                 parse_timesec(time, secs);
3185                 if (zone && strlen(zone) == STRING_SIZE(" +0700"))
3186                         parse_timezone(time, zone + 1);
3187         }
3190 /*
3191  * Pager backend
3192  */
3194 static bool
3195 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3197         if (opt_line_number && draw_lineno(view, lineno))
3198                 return TRUE;
3200         draw_text(view, line->type, line->data);
3201         return TRUE;
3204 static bool
3205 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3207         const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3208         char ref[SIZEOF_STR];
3210         if (!io_run_buf(describe_argv, ref, sizeof(ref)) || !*ref)
3211                 return TRUE;
3213         /* This is the only fatal call, since it can "corrupt" the buffer. */
3214         if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3215                 return FALSE;
3217         return TRUE;
3220 static void
3221 add_pager_refs(struct view *view, struct line *line)
3223         char buf[SIZEOF_STR];
3224         char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3225         struct ref_list *list;
3226         size_t bufpos = 0, i;
3227         const char *sep = "Refs: ";
3228         bool is_tag = FALSE;
3230         assert(line->type == LINE_COMMIT);
3232         list = get_ref_list(commit_id);
3233         if (!list) {
3234                 if (view->type == VIEW_DIFF)
3235                         goto try_add_describe_ref;
3236                 return;
3237         }
3239         for (i = 0; i < list->size; i++) {
3240                 struct ref *ref = list->refs[i];
3241                 const char *fmt = ref->tag    ? "%s[%s]" :
3242                                   ref->remote ? "%s<%s>" : "%s%s";
3244                 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3245                         return;
3246                 sep = ", ";
3247                 if (ref->tag)
3248                         is_tag = TRUE;
3249         }
3251         if (!is_tag && view->type == VIEW_DIFF) {
3252 try_add_describe_ref:
3253                 /* Add <tag>-g<commit_id> "fake" reference. */
3254                 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3255                         return;
3256         }
3258         if (bufpos == 0)
3259                 return;
3261         add_line_text(view, buf, LINE_PP_REFS);
3264 static bool
3265 pager_read(struct view *view, char *data)
3267         struct line *line;
3269         if (!data)
3270                 return TRUE;
3272         line = add_line_text(view, data, get_line_type(data));
3273         if (!line)
3274                 return FALSE;
3276         if (line->type == LINE_COMMIT &&
3277             (view->type == VIEW_DIFF ||
3278              view->type == VIEW_LOG))
3279                 add_pager_refs(view, line);
3281         return TRUE;
3284 static enum request
3285 pager_request(struct view *view, enum request request, struct line *line)
3287         int split = 0;
3289         if (request != REQ_ENTER)
3290                 return request;
3292         if (line->type == LINE_COMMIT &&
3293            (view->type == VIEW_LOG ||
3294             view->type == VIEW_PAGER)) {
3295                 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3296                 split = 1;
3297         }
3299         /* Always scroll the view even if it was split. That way
3300          * you can use Enter to scroll through the log view and
3301          * split open each commit diff. */
3302         scroll_view(view, REQ_SCROLL_LINE_DOWN);
3304         /* FIXME: A minor workaround. Scrolling the view will call report("")
3305          * but if we are scrolling a non-current view this won't properly
3306          * update the view title. */
3307         if (split)
3308                 update_view_title(view);
3310         return REQ_NONE;
3313 static bool
3314 pager_grep(struct view *view, struct line *line)
3316         const char *text[] = { line->data, NULL };
3318         return grep_text(view, text);
3321 static void
3322 pager_select(struct view *view, struct line *line)
3324         if (line->type == LINE_COMMIT) {
3325                 char *text = (char *)line->data + STRING_SIZE("commit ");
3327                 if (view->type != VIEW_PAGER)
3328                         string_copy_rev(view->ref, text);
3329                 string_copy_rev(ref_commit, text);
3330         }
3333 static struct view_ops pager_ops = {
3334         "line",
3335         NULL,
3336         NULL,
3337         pager_read,
3338         pager_draw,
3339         pager_request,
3340         pager_grep,
3341         pager_select,
3342 };
3344 static const char *log_argv[SIZEOF_ARG] = {
3345         "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3346 };
3348 static enum request
3349 log_request(struct view *view, enum request request, struct line *line)
3351         switch (request) {
3352         case REQ_REFRESH:
3353                 load_refs();
3354                 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3355                 return REQ_NONE;
3356         default:
3357                 return pager_request(view, request, line);
3358         }
3361 static struct view_ops log_ops = {
3362         "line",
3363         log_argv,
3364         NULL,
3365         pager_read,
3366         pager_draw,
3367         log_request,
3368         pager_grep,
3369         pager_select,
3370 };
3372 static const char *diff_argv[SIZEOF_ARG] = {
3373         "git", "show", "--pretty=fuller", "--no-color", "--root",
3374                 "--patch-with-stat", "--find-copies-harder", "-C",
3375                 "%(diffargs)", "%(commit)", "--", "%(fileargs)", NULL
3376 };
3378 static bool
3379 diff_read(struct view *view, char *data)
3381         if (!data) {
3382                 /* Fall back to retry if no diff will be shown. */
3383                 if (view->lines == 0 && opt_file_argv) {
3384                         int pos = argv_size(view->argv)
3385                                 - argv_size(opt_file_argv) - 1;
3387                         if (pos > 0 && !strcmp(view->argv[pos], "--")) {
3388                                 for (; view->argv[pos]; pos++) {
3389                                         free((void *) view->argv[pos]);
3390                                         view->argv[pos] = NULL;
3391                                 }
3393                                 if (view->pipe)
3394                                         io_done(view->pipe);
3395                                 if (io_run(&view->io, IO_RD, view->dir, view->argv))
3396                                         return FALSE;
3397                         }
3398                 }
3399                 return TRUE;
3400         }
3402         return pager_read(view, data);
3405 static struct view_ops diff_ops = {
3406         "line",
3407         diff_argv,
3408         NULL,
3409         diff_read,
3410         pager_draw,
3411         pager_request,
3412         pager_grep,
3413         pager_select,
3414 };
3416 /*
3417  * Help backend
3418  */
3420 static bool help_keymap_hidden[ARRAY_SIZE(keymap_table)];
3422 static bool
3423 help_open_keymap_title(struct view *view, enum keymap keymap)
3425         struct line *line;
3427         line = add_line_format(view, LINE_HELP_KEYMAP, "[%c] %s bindings",
3428                                help_keymap_hidden[keymap] ? '+' : '-',
3429                                enum_name(keymap_table[keymap]));
3430         if (line)
3431                 line->other = keymap;
3433         return help_keymap_hidden[keymap];
3436 static void
3437 help_open_keymap(struct view *view, enum keymap keymap)
3439         const char *group = NULL;
3440         char buf[SIZEOF_STR];
3441         size_t bufpos;
3442         bool add_title = TRUE;
3443         int i;
3445         for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3446                 const char *key = NULL;
3448                 if (req_info[i].request == REQ_NONE)
3449                         continue;
3451                 if (!req_info[i].request) {
3452                         group = req_info[i].help;
3453                         continue;
3454                 }
3456                 key = get_keys(keymap, req_info[i].request, TRUE);
3457                 if (!key || !*key)
3458                         continue;
3460                 if (add_title && help_open_keymap_title(view, keymap))
3461                         return;
3462                 add_title = FALSE;
3464                 if (group) {
3465                         add_line_text(view, group, LINE_HELP_GROUP);
3466                         group = NULL;
3467                 }
3469                 add_line_format(view, LINE_DEFAULT, "    %-25s %-20s %s", key,
3470                                 enum_name(req_info[i]), req_info[i].help);
3471         }
3473         group = "External commands:";
3475         for (i = 0; i < run_requests; i++) {
3476                 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3477                 const char *key;
3478                 int argc;
3480                 if (!req || req->keymap != keymap)
3481                         continue;
3483                 key = get_key_name(req->key);
3484                 if (!*key)
3485                         key = "(no key defined)";
3487                 if (add_title && help_open_keymap_title(view, keymap))
3488                         return;
3489                 if (group) {
3490                         add_line_text(view, group, LINE_HELP_GROUP);
3491                         group = NULL;
3492                 }
3494                 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3495                         if (!string_format_from(buf, &bufpos, "%s%s",
3496                                                 argc ? " " : "", req->argv[argc]))
3497                                 return;
3499                 add_line_format(view, LINE_DEFAULT, "    %-25s `%s`", key, buf);
3500         }
3503 static bool
3504 help_open(struct view *view)
3506         enum keymap keymap;
3508         reset_view(view);
3509         add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3510         add_line_text(view, "", LINE_DEFAULT);
3512         for (keymap = 0; keymap < ARRAY_SIZE(keymap_table); keymap++)
3513                 help_open_keymap(view, keymap);
3515         return TRUE;
3518 static enum request
3519 help_request(struct view *view, enum request request, struct line *line)
3521         switch (request) {
3522         case REQ_ENTER:
3523                 if (line->type == LINE_HELP_KEYMAP) {
3524                         help_keymap_hidden[line->other] =
3525                                 !help_keymap_hidden[line->other];
3526                         view->p_restore = TRUE;
3527                         open_view(view, REQ_VIEW_HELP, OPEN_REFRESH);
3528                 }
3530                 return REQ_NONE;
3531         default:
3532                 return pager_request(view, request, line);
3533         }
3536 static struct view_ops help_ops = {
3537         "line",
3538         NULL,
3539         help_open,
3540         NULL,
3541         pager_draw,
3542         help_request,
3543         pager_grep,
3544         pager_select,
3545 };
3548 /*
3549  * Tree backend
3550  */
3552 struct tree_stack_entry {
3553         struct tree_stack_entry *prev;  /* Entry below this in the stack */
3554         unsigned long lineno;           /* Line number to restore */
3555         char *name;                     /* Position of name in opt_path */
3556 };
3558 /* The top of the path stack. */
3559 static struct tree_stack_entry *tree_stack = NULL;
3560 unsigned long tree_lineno = 0;
3562 static void
3563 pop_tree_stack_entry(void)
3565         struct tree_stack_entry *entry = tree_stack;
3567         tree_lineno = entry->lineno;
3568         entry->name[0] = 0;
3569         tree_stack = entry->prev;
3570         free(entry);
3573 static void
3574 push_tree_stack_entry(const char *name, unsigned long lineno)
3576         struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3577         size_t pathlen = strlen(opt_path);
3579         if (!entry)
3580                 return;
3582         entry->prev = tree_stack;
3583         entry->name = opt_path + pathlen;
3584         tree_stack = entry;
3586         if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3587                 pop_tree_stack_entry();
3588                 return;
3589         }
3591         /* Move the current line to the first tree entry. */
3592         tree_lineno = 1;
3593         entry->lineno = lineno;
3596 /* Parse output from git-ls-tree(1):
3597  *
3598  * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3599  */
3601 #define SIZEOF_TREE_ATTR \
3602         STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
3604 #define SIZEOF_TREE_MODE \
3605         STRING_SIZE("100644 ")
3607 #define TREE_ID_OFFSET \
3608         STRING_SIZE("100644 blob ")
3610 struct tree_entry {
3611         char id[SIZEOF_REV];
3612         mode_t mode;
3613         struct time time;               /* Date from the author ident. */
3614         const char *author;             /* Author of the commit. */
3615         char name[1];
3616 };
3618 static const char *
3619 tree_path(const struct line *line)
3621         return ((struct tree_entry *) line->data)->name;
3624 static int
3625 tree_compare_entry(const struct line *line1, const struct line *line2)
3627         if (line1->type != line2->type)
3628                 return line1->type == LINE_TREE_DIR ? -1 : 1;
3629         return strcmp(tree_path(line1), tree_path(line2));
3632 static const enum sort_field tree_sort_fields[] = {
3633         ORDERBY_NAME, ORDERBY_DATE, ORDERBY_AUTHOR
3634 };
3635 static struct sort_state tree_sort_state = SORT_STATE(tree_sort_fields);
3637 static int
3638 tree_compare(const void *l1, const void *l2)
3640         const struct line *line1 = (const struct line *) l1;
3641         const struct line *line2 = (const struct line *) l2;
3642         const struct tree_entry *entry1 = ((const struct line *) l1)->data;
3643         const struct tree_entry *entry2 = ((const struct line *) l2)->data;
3645         if (line1->type == LINE_TREE_HEAD)
3646                 return -1;
3647         if (line2->type == LINE_TREE_HEAD)
3648                 return 1;
3650         switch (get_sort_field(tree_sort_state)) {
3651         case ORDERBY_DATE:
3652                 return sort_order(tree_sort_state, timecmp(&entry1->time, &entry2->time));
3654         case ORDERBY_AUTHOR:
3655                 return sort_order(tree_sort_state, strcmp(entry1->author, entry2->author));
3657         case ORDERBY_NAME:
3658         default:
3659                 return sort_order(tree_sort_state, tree_compare_entry(line1, line2));
3660         }
3664 static struct line *
3665 tree_entry(struct view *view, enum line_type type, const char *path,
3666            const char *mode, const char *id)
3668         struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3669         struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3671         if (!entry || !line) {
3672                 free(entry);
3673                 return NULL;
3674         }
3676         strncpy(entry->name, path, strlen(path));
3677         if (mode)
3678                 entry->mode = strtoul(mode, NULL, 8);
3679         if (id)
3680                 string_copy_rev(entry->id, id);
3682         return line;
3685 static bool
3686 tree_read_date(struct view *view, char *text, bool *read_date)
3688         static const char *author_name;
3689         static struct time author_time;
3691         if (!text && *read_date) {
3692                 *read_date = FALSE;
3693                 return TRUE;
3695         } else if (!text) {
3696                 char *path = *opt_path ? opt_path : ".";
3697                 /* Find next entry to process */
3698                 const char *log_file[] = {
3699                         "git", "log", "--no-color", "--pretty=raw",
3700                                 "--cc", "--raw", view->id, "--", path, NULL
3701                 };
3703                 if (!view->lines) {
3704                         tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
3705                         report("Tree is empty");
3706                         return TRUE;
3707                 }
3709                 if (!start_update(view, log_file, opt_cdup)) {
3710                         report("Failed to load tree data");
3711                         return TRUE;
3712                 }
3714                 *read_date = TRUE;
3715                 return FALSE;
3717         } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
3718                 parse_author_line(text + STRING_SIZE("author "),
3719                                   &author_name, &author_time);
3721         } else if (*text == ':') {
3722                 char *pos;
3723                 size_t annotated = 1;
3724                 size_t i;
3726                 pos = strchr(text, '\t');
3727                 if (!pos)
3728                         return TRUE;
3729                 text = pos + 1;
3730                 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
3731                         text += strlen(opt_path);
3732                 pos = strchr(text, '/');
3733                 if (pos)
3734                         *pos = 0;
3736                 for (i = 1; i < view->lines; i++) {
3737                         struct line *line = &view->line[i];
3738                         struct tree_entry *entry = line->data;
3740                         annotated += !!entry->author;
3741                         if (entry->author || strcmp(entry->name, text))
3742                                 continue;
3744                         entry->author = author_name;
3745                         entry->time = author_time;
3746                         line->dirty = 1;
3747                         break;
3748                 }
3750                 if (annotated == view->lines)
3751                         io_kill(view->pipe);
3752         }
3753         return TRUE;
3756 static bool
3757 tree_read(struct view *view, char *text)
3759         static bool read_date = FALSE;
3760         struct tree_entry *data;
3761         struct line *entry, *line;
3762         enum line_type type;
3763         size_t textlen = text ? strlen(text) : 0;
3764         char *path = text + SIZEOF_TREE_ATTR;
3766         if (read_date || !text)
3767                 return tree_read_date(view, text, &read_date);
3769         if (textlen <= SIZEOF_TREE_ATTR)
3770                 return FALSE;
3771         if (view->lines == 0 &&
3772             !tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL))
3773                 return FALSE;
3775         /* Strip the path part ... */
3776         if (*opt_path) {
3777                 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3778                 size_t striplen = strlen(opt_path);
3780                 if (pathlen > striplen)
3781                         memmove(path, path + striplen,
3782                                 pathlen - striplen + 1);
3784                 /* Insert "link" to parent directory. */
3785                 if (view->lines == 1 &&
3786                     !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
3787                         return FALSE;
3788         }
3790         type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
3791         entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
3792         if (!entry)
3793                 return FALSE;
3794         data = entry->data;
3796         /* Skip "Directory ..." and ".." line. */
3797         for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
3798                 if (tree_compare_entry(line, entry) <= 0)
3799                         continue;
3801                 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3803                 line->data = data;
3804                 line->type = type;
3805                 for (; line <= entry; line++)
3806                         line->dirty = line->cleareol = 1;
3807                 return TRUE;
3808         }
3810         if (tree_lineno > view->lineno) {
3811                 view->lineno = tree_lineno;
3812                 tree_lineno = 0;
3813         }
3815         return TRUE;
3818 static bool
3819 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3821         struct tree_entry *entry = line->data;
3823         if (line->type == LINE_TREE_HEAD) {
3824                 if (draw_text(view, line->type, "Directory path /"))
3825                         return TRUE;
3826         } else {
3827                 if (draw_mode(view, entry->mode))
3828                         return TRUE;
3830                 if (opt_author && draw_author(view, entry->author))
3831                         return TRUE;
3833                 if (opt_date && draw_date(view, &entry->time))
3834                         return TRUE;
3835         }
3837         draw_text(view, line->type, entry->name);
3838         return TRUE;
3841 static void
3842 open_blob_editor(const char *id)
3844         const char *blob_argv[] = { "git", "cat-file", "blob", id, NULL };
3845         char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3846         int fd = mkstemp(file);
3848         if (fd == -1)
3849                 report("Failed to create temporary file");
3850         else if (!io_run_append(blob_argv, fd))
3851                 report("Failed to save blob data to file");
3852         else
3853                 open_editor(file);
3854         if (fd != -1)
3855                 unlink(file);
3858 static enum request
3859 tree_request(struct view *view, enum request request, struct line *line)
3861         enum open_flags flags;
3862         struct tree_entry *entry = line->data;
3864         switch (request) {
3865         case REQ_VIEW_BLAME:
3866                 if (line->type != LINE_TREE_FILE) {
3867                         report("Blame only supported for files");
3868                         return REQ_NONE;
3869                 }
3871                 string_copy(opt_ref, view->vid);
3872                 return request;
3874         case REQ_EDIT:
3875                 if (line->type != LINE_TREE_FILE) {
3876                         report("Edit only supported for files");
3877                 } else if (!is_head_commit(view->vid)) {
3878                         open_blob_editor(entry->id);
3879                 } else {
3880                         open_editor(opt_file);
3881                 }
3882                 return REQ_NONE;
3884         case REQ_TOGGLE_SORT_FIELD:
3885         case REQ_TOGGLE_SORT_ORDER:
3886                 sort_view(view, request, &tree_sort_state, tree_compare);
3887                 return REQ_NONE;
3889         case REQ_PARENT:
3890                 if (!*opt_path) {
3891                         /* quit view if at top of tree */
3892                         return REQ_VIEW_CLOSE;
3893                 }
3894                 /* fake 'cd  ..' */
3895                 line = &view->line[1];
3896                 break;
3898         case REQ_ENTER:
3899                 break;
3901         default:
3902                 return request;
3903         }
3905         /* Cleanup the stack if the tree view is at a different tree. */
3906         while (!*opt_path && tree_stack)
3907                 pop_tree_stack_entry();
3909         switch (line->type) {
3910         case LINE_TREE_DIR:
3911                 /* Depending on whether it is a subdirectory or parent link
3912                  * mangle the path buffer. */
3913                 if (line == &view->line[1] && *opt_path) {
3914                         pop_tree_stack_entry();
3916                 } else {
3917                         const char *basename = tree_path(line);
3919                         push_tree_stack_entry(basename, view->lineno);
3920                 }
3922                 /* Trees and subtrees share the same ID, so they are not not
3923                  * unique like blobs. */
3924                 flags = OPEN_RELOAD;
3925                 request = REQ_VIEW_TREE;
3926                 break;
3928         case LINE_TREE_FILE:
3929                 flags = view_is_displayed(view) ? OPEN_SPLIT : OPEN_DEFAULT;
3930                 request = REQ_VIEW_BLOB;
3931                 break;
3933         default:
3934                 return REQ_NONE;
3935         }
3937         open_view(view, request, flags);
3938         if (request == REQ_VIEW_TREE)
3939                 view->lineno = tree_lineno;
3941         return REQ_NONE;
3944 static bool
3945 tree_grep(struct view *view, struct line *line)
3947         struct tree_entry *entry = line->data;
3948         const char *text[] = {
3949                 entry->name,
3950                 opt_author ? entry->author : "",
3951                 mkdate(&entry->time, opt_date),
3952                 NULL
3953         };
3955         return grep_text(view, text);
3958 static void
3959 tree_select(struct view *view, struct line *line)
3961         struct tree_entry *entry = line->data;
3963         if (line->type == LINE_TREE_FILE) {
3964                 string_copy_rev(ref_blob, entry->id);
3965                 string_format(opt_file, "%s%s", opt_path, tree_path(line));
3967         } else if (line->type != LINE_TREE_DIR) {
3968                 return;
3969         }
3971         string_copy_rev(view->ref, entry->id);
3974 static bool
3975 tree_prepare(struct view *view)
3977         if (view->lines == 0 && opt_prefix[0]) {
3978                 char *pos = opt_prefix;
3980                 while (pos && *pos) {
3981                         char *end = strchr(pos, '/');
3983                         if (end)
3984                                 *end = 0;
3985                         push_tree_stack_entry(pos, 0);
3986                         pos = end;
3987                         if (end) {
3988                                 *end = '/';
3989                                 pos++;
3990                         }
3991                 }
3993         } else if (strcmp(view->vid, view->id)) {
3994                 opt_path[0] = 0;
3995         }
3997         return prepare_io(view, opt_cdup, view->ops->argv, TRUE);
4000 static const char *tree_argv[SIZEOF_ARG] = {
4001         "git", "ls-tree", "%(commit)", "%(directory)", NULL
4002 };
4004 static struct view_ops tree_ops = {
4005         "file",
4006         tree_argv,
4007         NULL,
4008         tree_read,
4009         tree_draw,
4010         tree_request,
4011         tree_grep,
4012         tree_select,
4013         tree_prepare,
4014 };
4016 static bool
4017 blob_read(struct view *view, char *line)
4019         if (!line)
4020                 return TRUE;
4021         return add_line_text(view, line, LINE_DEFAULT) != NULL;
4024 static enum request
4025 blob_request(struct view *view, enum request request, struct line *line)
4027         switch (request) {
4028         case REQ_EDIT:
4029                 open_blob_editor(view->vid);
4030                 return REQ_NONE;
4031         default:
4032                 return pager_request(view, request, line);
4033         }
4036 static const char *blob_argv[SIZEOF_ARG] = {
4037         "git", "cat-file", "blob", "%(blob)", NULL
4038 };
4040 static struct view_ops blob_ops = {
4041         "line",
4042         blob_argv,
4043         NULL,
4044         blob_read,
4045         pager_draw,
4046         blob_request,
4047         pager_grep,
4048         pager_select,
4049 };
4051 /*
4052  * Blame backend
4053  *
4054  * Loading the blame view is a two phase job:
4055  *
4056  *  1. File content is read either using opt_file from the
4057  *     filesystem or using git-cat-file.
4058  *  2. Then blame information is incrementally added by
4059  *     reading output from git-blame.
4060  */
4062 struct blame_commit {
4063         char id[SIZEOF_REV];            /* SHA1 ID. */
4064         char title[128];                /* First line of the commit message. */
4065         const char *author;             /* Author of the commit. */
4066         struct time time;               /* Date from the author ident. */
4067         char filename[128];             /* Name of file. */
4068         char parent_id[SIZEOF_REV];     /* Parent/previous SHA1 ID. */
4069         char parent_filename[128];      /* Parent/previous name of file. */
4070 };
4072 struct blame {
4073         struct blame_commit *commit;
4074         unsigned long lineno;
4075         char text[1];
4076 };
4078 static bool
4079 blame_open(struct view *view)
4081         char path[SIZEOF_STR];
4082         size_t i;
4084         if (!view->prev && *opt_prefix) {
4085                 string_copy(path, opt_file);
4086                 if (!string_format(opt_file, "%s%s", opt_prefix, path))
4087                         return FALSE;
4088         }
4090         if (*opt_ref || !io_open(&view->io, "%s%s", opt_cdup, opt_file)) {
4091                 const char *blame_cat_file_argv[] = {
4092                         "git", "cat-file", "blob", path, NULL
4093                 };
4095                 if (!string_format(path, "%s:%s", opt_ref, opt_file) ||
4096                     !start_update(view, blame_cat_file_argv, opt_cdup))
4097                         return FALSE;
4098         }
4100         /* First pass: remove multiple references to the same commit. */
4101         for (i = 0; i < view->lines; i++) {
4102                 struct blame *blame = view->line[i].data;
4104                 if (blame->commit && blame->commit->id[0])
4105                         blame->commit->id[0] = 0;
4106                 else
4107                         blame->commit = NULL;
4108         }
4110         /* Second pass: free existing references. */
4111         for (i = 0; i < view->lines; i++) {
4112                 struct blame *blame = view->line[i].data;
4114                 if (blame->commit)
4115                         free(blame->commit);
4116         }
4118         setup_update(view, opt_file);
4119         string_format(view->ref, "%s ...", opt_file);
4121         return TRUE;
4124 static struct blame_commit *
4125 get_blame_commit(struct view *view, const char *id)
4127         size_t i;
4129         for (i = 0; i < view->lines; i++) {
4130                 struct blame *blame = view->line[i].data;
4132                 if (!blame->commit)
4133                         continue;
4135                 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4136                         return blame->commit;
4137         }
4139         {
4140                 struct blame_commit *commit = calloc(1, sizeof(*commit));
4142                 if (commit)
4143                         string_ncopy(commit->id, id, SIZEOF_REV);
4144                 return commit;
4145         }
4148 static bool
4149 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4151         const char *pos = *posref;
4153         *posref = NULL;
4154         pos = strchr(pos + 1, ' ');
4155         if (!pos || !isdigit(pos[1]))
4156                 return FALSE;
4157         *number = atoi(pos + 1);
4158         if (*number < min || *number > max)
4159                 return FALSE;
4161         *posref = pos;
4162         return TRUE;
4165 static struct blame_commit *
4166 parse_blame_commit(struct view *view, const char *text, int *blamed)
4168         struct blame_commit *commit;
4169         struct blame *blame;
4170         const char *pos = text + SIZEOF_REV - 2;
4171         size_t orig_lineno = 0;
4172         size_t lineno;
4173         size_t group;
4175         if (strlen(text) <= SIZEOF_REV || pos[1] != ' ')
4176                 return NULL;
4178         if (!parse_number(&pos, &orig_lineno, 1, 9999999) ||
4179             !parse_number(&pos, &lineno, 1, view->lines) ||
4180             !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4181                 return NULL;
4183         commit = get_blame_commit(view, text);
4184         if (!commit)
4185                 return NULL;
4187         *blamed += group;
4188         while (group--) {
4189                 struct line *line = &view->line[lineno + group - 1];
4191                 blame = line->data;
4192                 blame->commit = commit;
4193                 blame->lineno = orig_lineno + group - 1;
4194                 line->dirty = 1;
4195         }
4197         return commit;
4200 static bool
4201 blame_read_file(struct view *view, const char *line, bool *read_file)
4203         if (!line) {
4204                 const char *blame_argv[] = {
4205                         "git", "blame", "%(blameargs)", "--incremental",
4206                                 *opt_ref ? opt_ref : "--incremental", "--", opt_file, NULL
4207                 };
4209                 if (view->lines == 0 && !view->prev)
4210                         die("No blame exist for %s", view->vid);
4212                 if (view->lines == 0 || !start_update(view, blame_argv, opt_cdup)) {
4213                         report("Failed to load blame data");
4214                         return TRUE;
4215                 }
4217                 *read_file = FALSE;
4218                 return FALSE;
4220         } else {
4221                 size_t linelen = strlen(line);
4222                 struct blame *blame = malloc(sizeof(*blame) + linelen);
4224                 if (!blame)
4225                         return FALSE;
4227                 blame->commit = NULL;
4228                 strncpy(blame->text, line, linelen);
4229                 blame->text[linelen] = 0;
4230                 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4231         }
4234 static bool
4235 match_blame_header(const char *name, char **line)
4237         size_t namelen = strlen(name);
4238         bool matched = !strncmp(name, *line, namelen);
4240         if (matched)
4241                 *line += namelen;
4243         return matched;
4246 static bool
4247 blame_read(struct view *view, char *line)
4249         static struct blame_commit *commit = NULL;
4250         static int blamed = 0;
4251         static bool read_file = TRUE;
4253         if (read_file)
4254                 return blame_read_file(view, line, &read_file);
4256         if (!line) {
4257                 /* Reset all! */
4258                 commit = NULL;
4259                 blamed = 0;
4260                 read_file = TRUE;
4261                 string_format(view->ref, "%s", view->vid);
4262                 if (view_is_displayed(view)) {
4263                         update_view_title(view);
4264                         redraw_view_from(view, 0);
4265                 }
4266                 return TRUE;
4267         }
4269         if (!commit) {
4270                 commit = parse_blame_commit(view, line, &blamed);
4271                 string_format(view->ref, "%s %2d%%", view->vid,
4272                               view->lines ? blamed * 100 / view->lines : 0);
4274         } else if (match_blame_header("author ", &line)) {
4275                 commit->author = get_author(line);
4277         } else if (match_blame_header("author-time ", &line)) {
4278                 parse_timesec(&commit->time, line);
4280         } else if (match_blame_header("author-tz ", &line)) {
4281                 parse_timezone(&commit->time, line);
4283         } else if (match_blame_header("summary ", &line)) {
4284                 string_ncopy(commit->title, line, strlen(line));
4286         } else if (match_blame_header("previous ", &line)) {
4287                 if (strlen(line) <= SIZEOF_REV)
4288                         return FALSE;
4289                 string_copy_rev(commit->parent_id, line);
4290                 line += SIZEOF_REV;
4291                 string_ncopy(commit->parent_filename, line, strlen(line));
4293         } else if (match_blame_header("filename ", &line)) {
4294                 string_ncopy(commit->filename, line, strlen(line));
4295                 commit = NULL;
4296         }
4298         return TRUE;
4301 static bool
4302 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4304         struct blame *blame = line->data;
4305         struct time *time = NULL;
4306         const char *id = NULL, *author = NULL;
4308         if (blame->commit && *blame->commit->filename) {
4309                 id = blame->commit->id;
4310                 author = blame->commit->author;
4311                 time = &blame->commit->time;
4312         }
4314         if (opt_date && draw_date(view, time))
4315                 return TRUE;
4317         if (opt_author && draw_author(view, author))
4318                 return TRUE;
4320         if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4321                 return TRUE;
4323         if (draw_lineno(view, lineno))
4324                 return TRUE;
4326         draw_text(view, LINE_DEFAULT, blame->text);
4327         return TRUE;
4330 static bool
4331 check_blame_commit(struct blame *blame, bool check_null_id)
4333         if (!blame->commit)
4334                 report("Commit data not loaded yet");
4335         else if (check_null_id && !strcmp(blame->commit->id, NULL_ID))
4336                 report("No commit exist for the selected line");
4337         else
4338                 return TRUE;
4339         return FALSE;
4342 static void
4343 setup_blame_parent_line(struct view *view, struct blame *blame)
4345         char from[SIZEOF_REF + SIZEOF_STR];
4346         char to[SIZEOF_REF + SIZEOF_STR];
4347         const char *diff_tree_argv[] = {
4348                 "git", "diff", "--no-textconv", "--no-extdiff", "--no-color",
4349                         "-U0", from, to, "--", NULL
4350         };
4351         struct io io;
4352         int parent_lineno = -1;
4353         int blamed_lineno = -1;
4354         char *line;
4356         if (!string_format(from, "%s:%s", opt_ref, opt_file) ||
4357             !string_format(to, "%s:%s", blame->commit->id, blame->commit->filename) ||
4358             !io_run(&io, IO_RD, NULL, diff_tree_argv))
4359                 return;
4361         while ((line = io_get(&io, '\n', TRUE))) {
4362                 if (*line == '@') {
4363                         char *pos = strchr(line, '+');
4365                         parent_lineno = atoi(line + 4);
4366                         if (pos)
4367                                 blamed_lineno = atoi(pos + 1);
4369                 } else if (*line == '+' && parent_lineno != -1) {
4370                         if (blame->lineno == blamed_lineno - 1 &&
4371                             !strcmp(blame->text, line + 1)) {
4372                                 view->lineno = parent_lineno ? parent_lineno - 1 : 0;
4373                                 break;
4374                         }
4375                         blamed_lineno++;
4376                 }
4377         }
4379         io_done(&io);
4382 static enum request
4383 blame_request(struct view *view, enum request request, struct line *line)
4385         enum open_flags flags = view_is_displayed(view) ? OPEN_SPLIT : OPEN_DEFAULT;
4386         struct blame *blame = line->data;
4388         switch (request) {
4389         case REQ_VIEW_BLAME:
4390                 if (check_blame_commit(blame, TRUE)) {
4391                         string_copy(opt_ref, blame->commit->id);
4392                         string_copy(opt_file, blame->commit->filename);
4393                         if (blame->lineno)
4394                                 view->lineno = blame->lineno;
4395                         open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4396                 }
4397                 break;
4399         case REQ_PARENT:
4400                 if (!check_blame_commit(blame, TRUE))
4401                         break;
4402                 if (!*blame->commit->parent_id) {
4403                         report("The selected commit has no parents");
4404                 } else {
4405                         string_copy_rev(opt_ref, blame->commit->parent_id);
4406                         string_copy(opt_file, blame->commit->parent_filename);
4407                         setup_blame_parent_line(view, blame);
4408                         open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4409                 }
4410                 break;
4412         case REQ_ENTER:
4413                 if (!check_blame_commit(blame, FALSE))
4414                         break;
4416                 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4417                     !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4418                         break;
4420                 if (!strcmp(blame->commit->id, NULL_ID)) {
4421                         struct view *diff = VIEW(REQ_VIEW_DIFF);
4422                         const char *diff_index_argv[] = {
4423                                 "git", "diff-index", "--root", "--patch-with-stat",
4424                                         "-C", "-M", "HEAD", "--", view->vid, NULL
4425                         };
4427                         if (!*blame->commit->parent_id) {
4428                                 diff_index_argv[1] = "diff";
4429                                 diff_index_argv[2] = "--no-color";
4430                                 diff_index_argv[6] = "--";
4431                                 diff_index_argv[7] = "/dev/null";
4432                         }
4434                         if (!prepare_update(diff, diff_index_argv, NULL)) {
4435                                 report("Failed to allocate diff command");
4436                                 break;
4437                         }
4438                         flags |= OPEN_PREPARED;
4439                 }
4441                 open_view(view, REQ_VIEW_DIFF, flags);
4442                 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4443                         string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4444                 break;
4446         default:
4447                 return request;
4448         }
4450         return REQ_NONE;
4453 static bool
4454 blame_grep(struct view *view, struct line *line)
4456         struct blame *blame = line->data;
4457         struct blame_commit *commit = blame->commit;
4458         const char *text[] = {
4459                 blame->text,
4460                 commit ? commit->title : "",
4461                 commit ? commit->id : "",
4462                 commit && opt_author ? commit->author : "",
4463                 commit ? mkdate(&commit->time, opt_date) : "",
4464                 NULL
4465         };
4467         return grep_text(view, text);
4470 static void
4471 blame_select(struct view *view, struct line *line)
4473         struct blame *blame = line->data;
4474         struct blame_commit *commit = blame->commit;
4476         if (!commit)
4477                 return;
4479         if (!strcmp(commit->id, NULL_ID))
4480                 string_ncopy(ref_commit, "HEAD", 4);
4481         else
4482                 string_copy_rev(ref_commit, commit->id);
4485 static struct view_ops blame_ops = {
4486         "line",
4487         NULL,
4488         blame_open,
4489         blame_read,
4490         blame_draw,
4491         blame_request,
4492         blame_grep,
4493         blame_select,
4494 };
4496 /*
4497  * Branch backend
4498  */
4500 struct branch {
4501         const char *author;             /* Author of the last commit. */
4502         struct time time;               /* Date of the last activity. */
4503         const struct ref *ref;          /* Name and commit ID information. */
4504 };
4506 static const struct ref branch_all;
4508 static const enum sort_field branch_sort_fields[] = {
4509         ORDERBY_NAME, ORDERBY_DATE, ORDERBY_AUTHOR
4510 };
4511 static struct sort_state branch_sort_state = SORT_STATE(branch_sort_fields);
4513 static int
4514 branch_compare(const void *l1, const void *l2)
4516         const struct branch *branch1 = ((const struct line *) l1)->data;
4517         const struct branch *branch2 = ((const struct line *) l2)->data;
4519         switch (get_sort_field(branch_sort_state)) {
4520         case ORDERBY_DATE:
4521                 return sort_order(branch_sort_state, timecmp(&branch1->time, &branch2->time));
4523         case ORDERBY_AUTHOR:
4524                 return sort_order(branch_sort_state, strcmp(branch1->author, branch2->author));
4526         case ORDERBY_NAME:
4527         default:
4528                 return sort_order(branch_sort_state, strcmp(branch1->ref->name, branch2->ref->name));
4529         }
4532 static bool
4533 branch_draw(struct view *view, struct line *line, unsigned int lineno)
4535         struct branch *branch = line->data;
4536         enum line_type type = branch->ref->head ? LINE_MAIN_HEAD : LINE_DEFAULT;
4538         if (opt_date && draw_date(view, &branch->time))
4539                 return TRUE;
4541         if (opt_author && draw_author(view, branch->author))
4542                 return TRUE;
4544         draw_text(view, type, branch->ref == &branch_all ? "All branches" : branch->ref->name);
4545         return TRUE;
4548 static enum request
4549 branch_request(struct view *view, enum request request, struct line *line)
4551         struct branch *branch = line->data;
4553         switch (request) {
4554         case REQ_REFRESH:
4555                 load_refs();
4556                 open_view(view, REQ_VIEW_BRANCH, OPEN_REFRESH);
4557                 return REQ_NONE;
4559         case REQ_TOGGLE_SORT_FIELD:
4560         case REQ_TOGGLE_SORT_ORDER:
4561                 sort_view(view, request, &branch_sort_state, branch_compare);
4562                 return REQ_NONE;
4564         case REQ_ENTER:
4565         {
4566                 const struct ref *ref = branch->ref;
4567                 const char *all_branches_argv[] = {
4568                         "git", "log", "--no-color", "--pretty=raw", "--parents",
4569                               "--topo-order",
4570                               ref == &branch_all ? "--all" : ref->name, NULL
4571                 };
4572                 struct view *main_view = VIEW(REQ_VIEW_MAIN);
4574                 if (!prepare_update(main_view, all_branches_argv, NULL))
4575                         report("Failed to load view of all branches");
4576                 else
4577                         open_view(view, REQ_VIEW_MAIN, OPEN_PREPARED | OPEN_SPLIT);
4578                 return REQ_NONE;
4579         }
4580         default:
4581                 return request;
4582         }
4585 static bool
4586 branch_read(struct view *view, char *line)
4588         static char id[SIZEOF_REV];
4589         struct branch *reference;
4590         size_t i;
4592         if (!line)
4593                 return TRUE;
4595         switch (get_line_type(line)) {
4596         case LINE_COMMIT:
4597                 string_copy_rev(id, line + STRING_SIZE("commit "));
4598                 return TRUE;
4600         case LINE_AUTHOR:
4601                 for (i = 0, reference = NULL; i < view->lines; i++) {
4602                         struct branch *branch = view->line[i].data;
4604                         if (strcmp(branch->ref->id, id))
4605                                 continue;
4607                         view->line[i].dirty = TRUE;
4608                         if (reference) {
4609                                 branch->author = reference->author;
4610                                 branch->time = reference->time;
4611                                 continue;
4612                         }
4614                         parse_author_line(line + STRING_SIZE("author "),
4615                                           &branch->author, &branch->time);
4616                         reference = branch;
4617                 }
4618                 return TRUE;
4620         default:
4621                 return TRUE;
4622         }
4626 static bool
4627 branch_open_visitor(void *data, const struct ref *ref)
4629         struct view *view = data;
4630         struct branch *branch;
4632         if (ref->tag || ref->ltag || ref->remote)
4633                 return TRUE;
4635         branch = calloc(1, sizeof(*branch));
4636         if (!branch)
4637                 return FALSE;
4639         branch->ref = ref;
4640         return !!add_line_data(view, branch, LINE_DEFAULT);
4643 static bool
4644 branch_open(struct view *view)
4646         const char *branch_log[] = {
4647                 "git", "log", "--no-color", "--pretty=raw",
4648                         "--simplify-by-decoration", "--all", NULL
4649         };
4651         if (!start_update(view, branch_log, NULL)) {
4652                 report("Failed to load branch data");
4653                 return TRUE;
4654         }
4656         setup_update(view, view->id);
4657         branch_open_visitor(view, &branch_all);
4658         foreach_ref(branch_open_visitor, view);
4659         view->p_restore = TRUE;
4661         return TRUE;
4664 static bool
4665 branch_grep(struct view *view, struct line *line)
4667         struct branch *branch = line->data;
4668         const char *text[] = {
4669                 branch->ref->name,
4670                 branch->author,
4671                 NULL
4672         };
4674         return grep_text(view, text);
4677 static void
4678 branch_select(struct view *view, struct line *line)
4680         struct branch *branch = line->data;
4682         string_copy_rev(view->ref, branch->ref->id);
4683         string_copy_rev(ref_commit, branch->ref->id);
4684         string_copy_rev(ref_head, branch->ref->id);
4685         string_copy_rev(ref_branch, branch->ref->name);
4688 static struct view_ops branch_ops = {
4689         "branch",
4690         NULL,
4691         branch_open,
4692         branch_read,
4693         branch_draw,
4694         branch_request,
4695         branch_grep,
4696         branch_select,
4697 };
4699 /*
4700  * Status backend
4701  */
4703 struct status {
4704         char status;
4705         struct {
4706                 mode_t mode;
4707                 char rev[SIZEOF_REV];
4708                 char name[SIZEOF_STR];
4709         } old;
4710         struct {
4711                 mode_t mode;
4712                 char rev[SIZEOF_REV];
4713                 char name[SIZEOF_STR];
4714         } new;
4715 };
4717 static char status_onbranch[SIZEOF_STR];
4718 static struct status stage_status;
4719 static enum line_type stage_line_type;
4720 static size_t stage_chunks;
4721 static int *stage_chunk;
4723 DEFINE_ALLOCATOR(realloc_ints, int, 32)
4725 /* This should work even for the "On branch" line. */
4726 static inline bool
4727 status_has_none(struct view *view, struct line *line)
4729         return line < view->line + view->lines && !line[1].data;
4732 /* Get fields from the diff line:
4733  * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4734  */
4735 static inline bool
4736 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4738         const char *old_mode = buf +  1;
4739         const char *new_mode = buf +  8;
4740         const char *old_rev  = buf + 15;
4741         const char *new_rev  = buf + 56;
4742         const char *status   = buf + 97;
4744         if (bufsize < 98 ||
4745             old_mode[-1] != ':' ||
4746             new_mode[-1] != ' ' ||
4747             old_rev[-1]  != ' ' ||
4748             new_rev[-1]  != ' ' ||
4749             status[-1]   != ' ')
4750                 return FALSE;
4752         file->status = *status;
4754         string_copy_rev(file->old.rev, old_rev);
4755         string_copy_rev(file->new.rev, new_rev);
4757         file->old.mode = strtoul(old_mode, NULL, 8);
4758         file->new.mode = strtoul(new_mode, NULL, 8);
4760         file->old.name[0] = file->new.name[0] = 0;
4762         return TRUE;
4765 static bool
4766 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4768         struct status *unmerged = NULL;
4769         char *buf;
4770         struct io io;
4772         if (!io_run(&io, IO_RD, opt_cdup, argv))
4773                 return FALSE;
4775         add_line_data(view, NULL, type);
4777         while ((buf = io_get(&io, 0, TRUE))) {
4778                 struct status *file = unmerged;
4780                 if (!file) {
4781                         file = calloc(1, sizeof(*file));
4782                         if (!file || !add_line_data(view, file, type))
4783                                 goto error_out;
4784                 }
4786                 /* Parse diff info part. */
4787                 if (status) {
4788                         file->status = status;
4789                         if (status == 'A')
4790                                 string_copy(file->old.rev, NULL_ID);
4792                 } else if (!file->status || file == unmerged) {
4793                         if (!status_get_diff(file, buf, strlen(buf)))
4794                                 goto error_out;
4796                         buf = io_get(&io, 0, TRUE);
4797                         if (!buf)
4798                                 break;
4800                         /* Collapse all modified entries that follow an
4801                          * associated unmerged entry. */
4802                         if (unmerged == file) {
4803                                 unmerged->status = 'U';
4804                                 unmerged = NULL;
4805                         } else if (file->status == 'U') {
4806                                 unmerged = file;
4807                         }
4808                 }
4810                 /* Grab the old name for rename/copy. */
4811                 if (!*file->old.name &&
4812                     (file->status == 'R' || file->status == 'C')) {
4813                         string_ncopy(file->old.name, buf, strlen(buf));
4815                         buf = io_get(&io, 0, TRUE);
4816                         if (!buf)
4817                                 break;
4818                 }
4820                 /* git-ls-files just delivers a NUL separated list of
4821                  * file names similar to the second half of the
4822                  * git-diff-* output. */
4823                 string_ncopy(file->new.name, buf, strlen(buf));
4824                 if (!*file->old.name)
4825                         string_copy(file->old.name, file->new.name);
4826                 file = NULL;
4827         }
4829         if (io_error(&io)) {
4830 error_out:
4831                 io_done(&io);
4832                 return FALSE;
4833         }
4835         if (!view->line[view->lines - 1].data)
4836                 add_line_data(view, NULL, LINE_STAT_NONE);
4838         io_done(&io);
4839         return TRUE;
4842 /* Don't show unmerged entries in the staged section. */
4843 static const char *status_diff_index_argv[] = {
4844         "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4845                              "--cached", "-M", "HEAD", NULL
4846 };
4848 static const char *status_diff_files_argv[] = {
4849         "git", "diff-files", "-z", NULL
4850 };
4852 static const char *status_list_other_argv[] = {
4853         "git", "ls-files", "-z", "--others", "--exclude-standard", opt_prefix, NULL, NULL,
4854 };
4856 static const char *status_list_no_head_argv[] = {
4857         "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4858 };
4860 static const char *update_index_argv[] = {
4861         "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4862 };
4864 /* Restore the previous line number to stay in the context or select a
4865  * line with something that can be updated. */
4866 static void
4867 status_restore(struct view *view)
4869         if (view->p_lineno >= view->lines)
4870                 view->p_lineno = view->lines - 1;
4871         while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4872                 view->p_lineno++;
4873         while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4874                 view->p_lineno--;
4876         /* If the above fails, always skip the "On branch" line. */
4877         if (view->p_lineno < view->lines)
4878                 view->lineno = view->p_lineno;
4879         else
4880                 view->lineno = 1;
4882         if (view->lineno < view->offset)
4883                 view->offset = view->lineno;
4884         else if (view->offset + view->height <= view->lineno)
4885                 view->offset = view->lineno - view->height + 1;
4887         view->p_restore = FALSE;
4890 static void
4891 status_update_onbranch(void)
4893         static const char *paths[][2] = {
4894                 { "rebase-apply/rebasing",      "Rebasing" },
4895                 { "rebase-apply/applying",      "Applying mailbox" },
4896                 { "rebase-apply/",              "Rebasing mailbox" },
4897                 { "rebase-merge/interactive",   "Interactive rebase" },
4898                 { "rebase-merge/",              "Rebase merge" },
4899                 { "MERGE_HEAD",                 "Merging" },
4900                 { "BISECT_LOG",                 "Bisecting" },
4901                 { "HEAD",                       "On branch" },
4902         };
4903         char buf[SIZEOF_STR];
4904         struct stat stat;
4905         int i;
4907         if (is_initial_commit()) {
4908                 string_copy(status_onbranch, "Initial commit");
4909                 return;
4910         }
4912         for (i = 0; i < ARRAY_SIZE(paths); i++) {
4913                 char *head = opt_head;
4915                 if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
4916                     lstat(buf, &stat) < 0)
4917                         continue;
4919                 if (!*opt_head) {
4920                         struct io io;
4922                         if (io_open(&io, "%s/rebase-merge/head-name", opt_git_dir) &&
4923                             io_read_buf(&io, buf, sizeof(buf))) {
4924                                 head = buf;
4925                                 if (!prefixcmp(head, "refs/heads/"))
4926                                         head += STRING_SIZE("refs/heads/");
4927                         }
4928                 }
4930                 if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
4931                         string_copy(status_onbranch, opt_head);
4932                 return;
4933         }
4935         string_copy(status_onbranch, "Not currently on any branch");
4938 /* First parse staged info using git-diff-index(1), then parse unstaged
4939  * info using git-diff-files(1), and finally untracked files using
4940  * git-ls-files(1). */
4941 static bool
4942 status_open(struct view *view)
4944         reset_view(view);
4946         add_line_data(view, NULL, LINE_STAT_HEAD);
4947         status_update_onbranch();
4949         io_run_bg(update_index_argv);
4951         if (is_initial_commit()) {
4952                 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4953                         return FALSE;
4954         } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4955                 return FALSE;
4956         }
4958         if (!opt_untracked_dirs_content)
4959                 status_list_other_argv[ARRAY_SIZE(status_list_other_argv) - 2] = "--directory";
4961         if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4962             !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4963                 return FALSE;
4965         /* Restore the exact position or use the specialized restore
4966          * mode? */
4967         if (!view->p_restore)
4968                 status_restore(view);
4969         return TRUE;
4972 static bool
4973 status_draw(struct view *view, struct line *line, unsigned int lineno)
4975         struct status *status = line->data;
4976         enum line_type type;
4977         const char *text;
4979         if (!status) {
4980                 switch (line->type) {
4981                 case LINE_STAT_STAGED:
4982                         type = LINE_STAT_SECTION;
4983                         text = "Changes to be committed:";
4984                         break;
4986                 case LINE_STAT_UNSTAGED:
4987                         type = LINE_STAT_SECTION;
4988                         text = "Changed but not updated:";
4989                         break;
4991                 case LINE_STAT_UNTRACKED:
4992                         type = LINE_STAT_SECTION;
4993                         text = "Untracked files:";
4994                         break;
4996                 case LINE_STAT_NONE:
4997                         type = LINE_DEFAULT;
4998                         text = "  (no files)";
4999                         break;
5001                 case LINE_STAT_HEAD:
5002                         type = LINE_STAT_HEAD;
5003                         text = status_onbranch;
5004                         break;
5006                 default:
5007                         return FALSE;
5008                 }
5009         } else {
5010                 static char buf[] = { '?', ' ', ' ', ' ', 0 };
5012                 buf[0] = status->status;
5013                 if (draw_text(view, line->type, buf))
5014                         return TRUE;
5015                 type = LINE_DEFAULT;
5016                 text = status->new.name;
5017         }
5019         draw_text(view, type, text);
5020         return TRUE;
5023 static enum request
5024 status_load_error(struct view *view, struct view *stage, const char *path)
5026         if (displayed_views() == 2 || display[current_view] != view)
5027                 maximize_view(view);
5028         report("Failed to load '%s': %s", path, io_strerror(&stage->io));
5029         return REQ_NONE;
5032 static enum request
5033 status_enter(struct view *view, struct line *line)
5035         struct status *status = line->data;
5036         const char *oldpath = status ? status->old.name : NULL;
5037         /* Diffs for unmerged entries are empty when passing the new
5038          * path, so leave it empty. */
5039         const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
5040         const char *info;
5041         enum open_flags split;
5042         struct view *stage = VIEW(REQ_VIEW_STAGE);
5044         if (line->type == LINE_STAT_NONE ||
5045             (!status && line[1].type == LINE_STAT_NONE)) {
5046                 report("No file to diff");
5047                 return REQ_NONE;
5048         }
5050         switch (line->type) {
5051         case LINE_STAT_STAGED:
5052                 if (is_initial_commit()) {
5053                         const char *no_head_diff_argv[] = {
5054                                 "git", "diff", "--no-color", "--patch-with-stat",
5055                                         "--", "/dev/null", newpath, NULL
5056                         };
5058                         if (!prepare_update(stage, no_head_diff_argv, opt_cdup))
5059                                 return status_load_error(view, stage, newpath);
5060                 } else {
5061                         const char *index_show_argv[] = {
5062                                 "git", "diff-index", "--root", "--patch-with-stat",
5063                                         "-C", "-M", "--cached", "HEAD", "--",
5064                                         oldpath, newpath, NULL
5065                         };
5067                         if (!prepare_update(stage, index_show_argv, opt_cdup))
5068                                 return status_load_error(view, stage, newpath);
5069                 }
5071                 if (status)
5072                         info = "Staged changes to %s";
5073                 else
5074                         info = "Staged changes";
5075                 break;
5077         case LINE_STAT_UNSTAGED:
5078         {
5079                 const char *files_show_argv[] = {
5080                         "git", "diff-files", "--root", "--patch-with-stat",
5081                                 "-C", "-M", "--", oldpath, newpath, NULL
5082                 };
5084                 if (!prepare_update(stage, files_show_argv, opt_cdup))
5085                         return status_load_error(view, stage, newpath);
5086                 if (status)
5087                         info = "Unstaged changes to %s";
5088                 else
5089                         info = "Unstaged changes";
5090                 break;
5091         }
5092         case LINE_STAT_UNTRACKED:
5093                 if (!newpath) {
5094                         report("No file to show");
5095                         return REQ_NONE;
5096                 }
5098                 if (!suffixcmp(status->new.name, -1, "/")) {
5099                         report("Cannot display a directory");
5100                         return REQ_NONE;
5101                 }
5103                 if (!prepare_update_file(stage, newpath))
5104                         return status_load_error(view, stage, newpath);
5105                 info = "Untracked file %s";
5106                 break;
5108         case LINE_STAT_HEAD:
5109                 return REQ_NONE;
5111         default:
5112                 die("line type %d not handled in switch", line->type);
5113         }
5115         split = view_is_displayed(view) ? OPEN_SPLIT : OPEN_DEFAULT;
5116         open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
5117         if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
5118                 if (status) {
5119                         stage_status = *status;
5120                 } else {
5121                         memset(&stage_status, 0, sizeof(stage_status));
5122                 }
5124                 stage_line_type = line->type;
5125                 stage_chunks = 0;
5126                 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
5127         }
5129         return REQ_NONE;
5132 static bool
5133 status_exists(struct status *status, enum line_type type)
5135         struct view *view = VIEW(REQ_VIEW_STATUS);
5136         unsigned long lineno;
5138         for (lineno = 0; lineno < view->lines; lineno++) {
5139                 struct line *line = &view->line[lineno];
5140                 struct status *pos = line->data;
5142                 if (line->type != type)
5143                         continue;
5144                 if (!pos && (!status || !status->status) && line[1].data) {
5145                         select_view_line(view, lineno);
5146                         return TRUE;
5147                 }
5148                 if (pos && !strcmp(status->new.name, pos->new.name)) {
5149                         select_view_line(view, lineno);
5150                         return TRUE;
5151                 }
5152         }
5154         return FALSE;
5158 static bool
5159 status_update_prepare(struct io *io, enum line_type type)
5161         const char *staged_argv[] = {
5162                 "git", "update-index", "-z", "--index-info", NULL
5163         };
5164         const char *others_argv[] = {
5165                 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
5166         };
5168         switch (type) {
5169         case LINE_STAT_STAGED:
5170                 return io_run(io, IO_WR, opt_cdup, staged_argv);
5172         case LINE_STAT_UNSTAGED:
5173         case LINE_STAT_UNTRACKED:
5174                 return io_run(io, IO_WR, opt_cdup, others_argv);
5176         default:
5177                 die("line type %d not handled in switch", type);
5178                 return FALSE;
5179         }
5182 static bool
5183 status_update_write(struct io *io, struct status *status, enum line_type type)
5185         char buf[SIZEOF_STR];
5186         size_t bufsize = 0;
5188         switch (type) {
5189         case LINE_STAT_STAGED:
5190                 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
5191                                         status->old.mode,
5192                                         status->old.rev,
5193                                         status->old.name, 0))
5194                         return FALSE;
5195                 break;
5197         case LINE_STAT_UNSTAGED:
5198         case LINE_STAT_UNTRACKED:
5199                 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
5200                         return FALSE;
5201                 break;
5203         default:
5204                 die("line type %d not handled in switch", type);
5205         }
5207         return io_write(io, buf, bufsize);
5210 static bool
5211 status_update_file(struct status *status, enum line_type type)
5213         struct io io;
5214         bool result;
5216         if (!status_update_prepare(&io, type))
5217                 return FALSE;
5219         result = status_update_write(&io, status, type);
5220         return io_done(&io) && result;
5223 static bool
5224 status_update_files(struct view *view, struct line *line)
5226         char buf[sizeof(view->ref)];
5227         struct io io;
5228         bool result = TRUE;
5229         struct line *pos = view->line + view->lines;
5230         int files = 0;
5231         int file, done;
5232         int cursor_y = -1, cursor_x = -1;
5234         if (!status_update_prepare(&io, line->type))
5235                 return FALSE;
5237         for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5238                 files++;
5240         string_copy(buf, view->ref);
5241         getsyx(cursor_y, cursor_x);
5242         for (file = 0, done = 5; result && file < files; line++, file++) {
5243                 int almost_done = file * 100 / files;
5245                 if (almost_done > done) {
5246                         done = almost_done;
5247                         string_format(view->ref, "updating file %u of %u (%d%% done)",
5248                                       file, files, done);
5249                         update_view_title(view);
5250                         setsyx(cursor_y, cursor_x);
5251                         doupdate();
5252                 }
5253                 result = status_update_write(&io, line->data, line->type);
5254         }
5255         string_copy(view->ref, buf);
5257         return io_done(&io) && result;
5260 static bool
5261 status_update(struct view *view)
5263         struct line *line = &view->line[view->lineno];
5265         assert(view->lines);
5267         if (!line->data) {
5268                 /* This should work even for the "On branch" line. */
5269                 if (line < view->line + view->lines && !line[1].data) {
5270                         report("Nothing to update");
5271                         return FALSE;
5272                 }
5274                 if (!status_update_files(view, line + 1)) {
5275                         report("Failed to update file status");
5276                         return FALSE;
5277                 }
5279         } else if (!status_update_file(line->data, line->type)) {
5280                 report("Failed to update file status");
5281                 return FALSE;
5282         }
5284         return TRUE;
5287 static bool
5288 status_revert(struct status *status, enum line_type type, bool has_none)
5290         if (!status || type != LINE_STAT_UNSTAGED) {
5291                 if (type == LINE_STAT_STAGED) {
5292                         report("Cannot revert changes to staged files");
5293                 } else if (type == LINE_STAT_UNTRACKED) {
5294                         report("Cannot revert changes to untracked files");
5295                 } else if (has_none) {
5296                         report("Nothing to revert");
5297                 } else {
5298                         report("Cannot revert changes to multiple files");
5299                 }
5301         } else if (prompt_yesno("Are you sure you want to revert changes?")) {
5302                 char mode[10] = "100644";
5303                 const char *reset_argv[] = {
5304                         "git", "update-index", "--cacheinfo", mode,
5305                                 status->old.rev, status->old.name, NULL
5306                 };
5307                 const char *checkout_argv[] = {
5308                         "git", "checkout", "--", status->old.name, NULL
5309                 };
5311                 if (status->status == 'U') {
5312                         string_format(mode, "%5o", status->old.mode);
5314                         if (status->old.mode == 0 && status->new.mode == 0) {
5315                                 reset_argv[2] = "--force-remove";
5316                                 reset_argv[3] = status->old.name;
5317                                 reset_argv[4] = NULL;
5318                         }
5320                         if (!io_run_fg(reset_argv, opt_cdup))
5321                                 return FALSE;
5322                         if (status->old.mode == 0 && status->new.mode == 0)
5323                                 return TRUE;
5324                 }
5326                 return io_run_fg(checkout_argv, opt_cdup);
5327         }
5329         return FALSE;
5332 static enum request
5333 status_request(struct view *view, enum request request, struct line *line)
5335         struct status *status = line->data;
5337         switch (request) {
5338         case REQ_STATUS_UPDATE:
5339                 if (!status_update(view))
5340                         return REQ_NONE;
5341                 break;
5343         case REQ_STATUS_REVERT:
5344                 if (!status_revert(status, line->type, status_has_none(view, line)))
5345                         return REQ_NONE;
5346                 break;
5348         case REQ_STATUS_MERGE:
5349                 if (!status || status->status != 'U') {
5350                         report("Merging only possible for files with unmerged status ('U').");
5351                         return REQ_NONE;
5352                 }
5353                 open_mergetool(status->new.name);
5354                 break;
5356         case REQ_EDIT:
5357                 if (!status)
5358                         return request;
5359                 if (status->status == 'D') {
5360                         report("File has been deleted.");
5361                         return REQ_NONE;
5362                 }
5364                 open_editor(status->new.name);
5365                 break;
5367         case REQ_VIEW_BLAME:
5368                 if (status)
5369                         opt_ref[0] = 0;
5370                 return request;
5372         case REQ_ENTER:
5373                 /* After returning the status view has been split to
5374                  * show the stage view. No further reloading is
5375                  * necessary. */
5376                 return status_enter(view, line);
5378         case REQ_REFRESH:
5379                 /* Simply reload the view. */
5380                 break;
5382         default:
5383                 return request;
5384         }
5386         open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5388         return REQ_NONE;
5391 static void
5392 status_select(struct view *view, struct line *line)
5394         struct status *status = line->data;
5395         char file[SIZEOF_STR] = "all files";
5396         const char *text;
5397         const char *key;
5399         if (status && !string_format(file, "'%s'", status->new.name))
5400                 return;
5402         if (!status && line[1].type == LINE_STAT_NONE)
5403                 line++;
5405         switch (line->type) {
5406         case LINE_STAT_STAGED:
5407                 text = "Press %s to unstage %s for commit";
5408                 break;
5410         case LINE_STAT_UNSTAGED:
5411                 text = "Press %s to stage %s for commit";
5412                 break;
5414         case LINE_STAT_UNTRACKED:
5415                 text = "Press %s to stage %s for addition";
5416                 break;
5418         case LINE_STAT_HEAD:
5419         case LINE_STAT_NONE:
5420                 text = "Nothing to update";
5421                 break;
5423         default:
5424                 die("line type %d not handled in switch", line->type);
5425         }
5427         if (status && status->status == 'U') {
5428                 text = "Press %s to resolve conflict in %s";
5429                 key = get_key(KEYMAP_STATUS, REQ_STATUS_MERGE);
5431         } else {
5432                 key = get_key(KEYMAP_STATUS, REQ_STATUS_UPDATE);
5433         }
5435         string_format(view->ref, text, key, file);
5436         if (status)
5437                 string_copy(opt_file, status->new.name);
5440 static bool
5441 status_grep(struct view *view, struct line *line)
5443         struct status *status = line->data;
5445         if (status) {
5446                 const char buf[2] = { status->status, 0 };
5447                 const char *text[] = { status->new.name, buf, NULL };
5449                 return grep_text(view, text);
5450         }
5452         return FALSE;
5455 static struct view_ops status_ops = {
5456         "file",
5457         NULL,
5458         status_open,
5459         NULL,
5460         status_draw,
5461         status_request,
5462         status_grep,
5463         status_select,
5464 };
5467 static bool
5468 stage_diff_write(struct io *io, struct line *line, struct line *end)
5470         while (line < end) {
5471                 if (!io_write(io, line->data, strlen(line->data)) ||
5472                     !io_write(io, "\n", 1))
5473                         return FALSE;
5474                 line++;
5475                 if (line->type == LINE_DIFF_CHUNK ||
5476                     line->type == LINE_DIFF_HEADER)
5477                         break;
5478         }
5480         return TRUE;
5483 static struct line *
5484 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5486         for (; view->line < line; line--)
5487                 if (line->type == type)
5488                         return line;
5490         return NULL;
5493 static bool
5494 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5496         const char *apply_argv[SIZEOF_ARG] = {
5497                 "git", "apply", "--whitespace=nowarn", NULL
5498         };
5499         struct line *diff_hdr;
5500         struct io io;
5501         int argc = 3;
5503         diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5504         if (!diff_hdr)
5505                 return FALSE;
5507         if (!revert)
5508                 apply_argv[argc++] = "--cached";
5509         if (revert || stage_line_type == LINE_STAT_STAGED)
5510                 apply_argv[argc++] = "-R";
5511         apply_argv[argc++] = "-";
5512         apply_argv[argc++] = NULL;
5513         if (!io_run(&io, IO_WR, opt_cdup, apply_argv))
5514                 return FALSE;
5516         if (!stage_diff_write(&io, diff_hdr, chunk) ||
5517             !stage_diff_write(&io, chunk, view->line + view->lines))
5518                 chunk = NULL;
5520         io_done(&io);
5521         io_run_bg(update_index_argv);
5523         return chunk ? TRUE : FALSE;
5526 static bool
5527 stage_update(struct view *view, struct line *line)
5529         struct line *chunk = NULL;
5531         if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5532                 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5534         if (chunk) {
5535                 if (!stage_apply_chunk(view, chunk, FALSE)) {
5536                         report("Failed to apply chunk");
5537                         return FALSE;
5538                 }
5540         } else if (!stage_status.status) {
5541                 view = VIEW(REQ_VIEW_STATUS);
5543                 for (line = view->line; line < view->line + view->lines; line++)
5544                         if (line->type == stage_line_type)
5545                                 break;
5547                 if (!status_update_files(view, line + 1)) {
5548                         report("Failed to update files");
5549                         return FALSE;
5550                 }
5552         } else if (!status_update_file(&stage_status, stage_line_type)) {
5553                 report("Failed to update file");
5554                 return FALSE;
5555         }
5557         return TRUE;
5560 static bool
5561 stage_revert(struct view *view, struct line *line)
5563         struct line *chunk = NULL;
5565         if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5566                 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5568         if (chunk) {
5569                 if (!prompt_yesno("Are you sure you want to revert changes?"))
5570                         return FALSE;
5572                 if (!stage_apply_chunk(view, chunk, TRUE)) {
5573                         report("Failed to revert chunk");
5574                         return FALSE;
5575                 }
5576                 return TRUE;
5578         } else {
5579                 return status_revert(stage_status.status ? &stage_status : NULL,
5580                                      stage_line_type, FALSE);
5581         }
5585 static void
5586 stage_next(struct view *view, struct line *line)
5588         int i;
5590         if (!stage_chunks) {
5591                 for (line = view->line; line < view->line + view->lines; line++) {
5592                         if (line->type != LINE_DIFF_CHUNK)
5593                                 continue;
5595                         if (!realloc_ints(&stage_chunk, stage_chunks, 1)) {
5596                                 report("Allocation failure");
5597                                 return;
5598                         }
5600                         stage_chunk[stage_chunks++] = line - view->line;
5601                 }
5602         }
5604         for (i = 0; i < stage_chunks; i++) {
5605                 if (stage_chunk[i] > view->lineno) {
5606                         do_scroll_view(view, stage_chunk[i] - view->lineno);
5607                         report("Chunk %d of %d", i + 1, stage_chunks);
5608                         return;
5609                 }
5610         }
5612         report("No next chunk found");
5615 static enum request
5616 stage_request(struct view *view, enum request request, struct line *line)
5618         switch (request) {
5619         case REQ_STATUS_UPDATE:
5620                 if (!stage_update(view, line))
5621                         return REQ_NONE;
5622                 break;
5624         case REQ_STATUS_REVERT:
5625                 if (!stage_revert(view, line))
5626                         return REQ_NONE;
5627                 break;
5629         case REQ_STAGE_NEXT:
5630                 if (stage_line_type == LINE_STAT_UNTRACKED) {
5631                         report("File is untracked; press %s to add",
5632                                get_key(KEYMAP_STAGE, REQ_STATUS_UPDATE));
5633                         return REQ_NONE;
5634                 }
5635                 stage_next(view, line);
5636                 return REQ_NONE;
5638         case REQ_EDIT:
5639                 if (!stage_status.new.name[0])
5640                         return request;
5641                 if (stage_status.status == 'D') {
5642                         report("File has been deleted.");
5643                         return REQ_NONE;
5644                 }
5646                 open_editor(stage_status.new.name);
5647                 break;
5649         case REQ_REFRESH:
5650                 /* Reload everything ... */
5651                 break;
5653         case REQ_VIEW_BLAME:
5654                 if (stage_status.new.name[0]) {
5655                         string_copy(opt_file, stage_status.new.name);
5656                         opt_ref[0] = 0;
5657                 }
5658                 return request;
5660         case REQ_ENTER:
5661                 return pager_request(view, request, line);
5663         default:
5664                 return request;
5665         }
5667         VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5668         open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
5670         /* Check whether the staged entry still exists, and close the
5671          * stage view if it doesn't. */
5672         if (!status_exists(&stage_status, stage_line_type)) {
5673                 status_restore(VIEW(REQ_VIEW_STATUS));
5674                 return REQ_VIEW_CLOSE;
5675         }
5677         if (stage_line_type == LINE_STAT_UNTRACKED) {
5678                 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5679                         report("Cannot display a directory");
5680                         return REQ_NONE;
5681                 }
5683                 if (!prepare_update_file(view, stage_status.new.name)) {
5684                         report("Failed to open file: %s", strerror(errno));
5685                         return REQ_NONE;
5686                 }
5687         }
5688         open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5690         return REQ_NONE;
5693 static struct view_ops stage_ops = {
5694         "line",
5695         NULL,
5696         NULL,
5697         pager_read,
5698         pager_draw,
5699         stage_request,
5700         pager_grep,
5701         pager_select,
5702 };
5705 /*
5706  * Revision graph
5707  */
5709 static const enum line_type graph_colors[] = {
5710         LINE_GRAPH_LINE_0,
5711         LINE_GRAPH_LINE_1,
5712         LINE_GRAPH_LINE_2,
5713         LINE_GRAPH_LINE_3,
5714         LINE_GRAPH_LINE_4,
5715         LINE_GRAPH_LINE_5,
5716         LINE_GRAPH_LINE_6,
5717 };
5719 static enum line_type get_graph_color(struct graph_symbol *symbol)
5721         if (symbol->commit)
5722                 return LINE_GRAPH_COMMIT;
5723         assert(symbol->color < ARRAY_SIZE(graph_colors));
5724         return graph_colors[symbol->color];
5727 static bool
5728 draw_graph_utf8(struct view *view, struct graph_symbol *symbol, enum line_type color, bool first)
5730         const char *chars = graph_symbol_to_utf8(symbol);
5732         return draw_text(view, color, chars + !!first); 
5735 static bool
5736 draw_graph_ascii(struct view *view, struct graph_symbol *symbol, enum line_type color, bool first)
5738         const char *chars = graph_symbol_to_ascii(symbol);
5740         return draw_text(view, color, chars + !!first); 
5743 static bool
5744 draw_graph_chtype(struct view *view, struct graph_symbol *symbol, enum line_type color, bool first)
5746         const chtype *chars = graph_symbol_to_chtype(symbol);
5748         return draw_graphic(view, color, chars + !!first, 2 - !!first, FALSE); 
5751 typedef bool (*draw_graph_fn)(struct view *, struct graph_symbol *, enum line_type, bool);
5753 static bool draw_graph(struct view *view, struct graph_canvas *canvas)
5755         static const draw_graph_fn fns[] = {
5756                 draw_graph_ascii,
5757                 draw_graph_chtype,
5758                 draw_graph_utf8
5759         };
5760         draw_graph_fn fn = fns[opt_line_graphics];
5761         int i;
5763         for (i = 0; i < canvas->size; i++) {
5764                 struct graph_symbol *symbol = &canvas->symbols[i];
5765                 enum line_type color = get_graph_color(symbol);
5767                 if (fn(view, symbol, color, i == 0))
5768                         return TRUE;
5769         }
5771         return draw_text(view, LINE_MAIN_REVGRAPH, " ");
5774 /*
5775  * Main view backend
5776  */
5778 struct commit {
5779         char id[SIZEOF_REV];            /* SHA1 ID. */
5780         char title[128];                /* First line of the commit message. */
5781         const char *author;             /* Author of the commit. */
5782         struct time time;               /* Date from the author ident. */
5783         struct ref_list *refs;          /* Repository references. */
5784         struct graph_canvas graph;      /* Ancestry chain graphics. */
5785 };
5787 static const char *main_argv[SIZEOF_ARG] = {
5788         "git", "log", "--no-color", "--pretty=raw", "--parents",
5789                 "--topo-order", "%(diffargs)", "%(revargs)",
5790                 "--", "%(fileargs)", NULL
5791 };
5793 static bool
5794 main_draw(struct view *view, struct line *line, unsigned int lineno)
5796         struct commit *commit = line->data;
5798         if (!commit->author)
5799                 return FALSE;
5801         if (opt_date && draw_date(view, &commit->time))
5802                 return TRUE;
5804         if (opt_author && draw_author(view, commit->author))
5805                 return TRUE;
5807         if (opt_rev_graph && draw_graph(view, &commit->graph))
5808                 return TRUE;
5810         if (opt_show_refs && commit->refs) {
5811                 size_t i;
5813                 for (i = 0; i < commit->refs->size; i++) {
5814                         struct ref *ref = commit->refs->refs[i];
5815                         enum line_type type;
5817                         if (ref->head)
5818                                 type = LINE_MAIN_HEAD;
5819                         else if (ref->ltag)
5820                                 type = LINE_MAIN_LOCAL_TAG;
5821                         else if (ref->tag)
5822                                 type = LINE_MAIN_TAG;
5823                         else if (ref->tracked)
5824                                 type = LINE_MAIN_TRACKED;
5825                         else if (ref->remote)
5826                                 type = LINE_MAIN_REMOTE;
5827                         else
5828                                 type = LINE_MAIN_REF;
5830                         if (draw_text(view, type, "[") ||
5831                             draw_text(view, type, ref->name) ||
5832                             draw_text(view, type, "]"))
5833                                 return TRUE;
5835                         if (draw_text(view, LINE_DEFAULT, " "))
5836                                 return TRUE;
5837                 }
5838         }
5840         draw_text(view, LINE_DEFAULT, commit->title);
5841         return TRUE;
5844 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5845 static bool
5846 main_read(struct view *view, char *line)
5848         static struct graph graph;
5849         enum line_type type;
5850         struct commit *commit;
5852         if (!line) {
5853                 if (!view->lines && !view->prev)
5854                         die("No revisions match the given arguments.");
5855                 if (view->lines > 0) {
5856                         commit = view->line[view->lines - 1].data;
5857                         view->line[view->lines - 1].dirty = 1;
5858                         if (!commit->author) {
5859                                 view->lines--;
5860                                 free(commit);
5861                         }
5862                 }
5864                 done_graph(&graph);
5865                 return TRUE;
5866         }
5868         type = get_line_type(line);
5869         if (type == LINE_COMMIT) {
5870                 bool is_boundary;
5872                 commit = calloc(1, sizeof(struct commit));
5873                 if (!commit)
5874                         return FALSE;
5876                 line += STRING_SIZE("commit ");
5877                 is_boundary = *line == '-';
5878                 if (is_boundary)
5879                         line++;
5881                 string_copy_rev(commit->id, line);
5882                 commit->refs = get_ref_list(commit->id);
5883                 add_line_data(view, commit, LINE_MAIN_COMMIT);
5884                 graph_add_commit(&graph, &commit->graph, commit->id, line, is_boundary);
5885                 return TRUE;
5886         }
5888         if (!view->lines)
5889                 return TRUE;
5890         commit = view->line[view->lines - 1].data;
5892         switch (type) {
5893         case LINE_PARENT:
5894                 if (!graph.has_parents)
5895                         graph_add_parent(&graph, line + STRING_SIZE("parent "));
5896                 break;
5898         case LINE_AUTHOR:
5899                 parse_author_line(line + STRING_SIZE("author "),
5900                                   &commit->author, &commit->time);
5901                 graph_render_parents(&graph);
5902                 break;
5904         default:
5905                 /* Fill in the commit title if it has not already been set. */
5906                 if (commit->title[0])
5907                         break;
5909                 /* Require titles to start with a non-space character at the
5910                  * offset used by git log. */
5911                 if (strncmp(line, "    ", 4))
5912                         break;
5913                 line += 4;
5914                 /* Well, if the title starts with a whitespace character,
5915                  * try to be forgiving.  Otherwise we end up with no title. */
5916                 while (isspace(*line))
5917                         line++;
5918                 if (*line == '\0')
5919                         break;
5920                 /* FIXME: More graceful handling of titles; append "..." to
5921                  * shortened titles, etc. */
5923                 string_expand(commit->title, sizeof(commit->title), line, 1);
5924                 view->line[view->lines - 1].dirty = 1;
5925         }
5927         return TRUE;
5930 static enum request
5931 main_request(struct view *view, enum request request, struct line *line)
5933         enum open_flags flags = view_is_displayed(view) ? OPEN_SPLIT : OPEN_DEFAULT;
5935         switch (request) {
5936         case REQ_ENTER:
5937                 if (view_is_displayed(view) && display[0] != view)
5938                         maximize_view(view);
5939                 open_view(view, REQ_VIEW_DIFF, flags);
5940                 break;
5941         case REQ_REFRESH:
5942                 load_refs();
5943                 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5944                 break;
5945         default:
5946                 return request;
5947         }
5949         return REQ_NONE;
5952 static bool
5953 grep_refs(struct ref_list *list, regex_t *regex)
5955         regmatch_t pmatch;
5956         size_t i;
5958         if (!opt_show_refs || !list)
5959                 return FALSE;
5961         for (i = 0; i < list->size; i++) {
5962                 if (regexec(regex, list->refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5963                         return TRUE;
5964         }
5966         return FALSE;
5969 static bool
5970 main_grep(struct view *view, struct line *line)
5972         struct commit *commit = line->data;
5973         const char *text[] = {
5974                 commit->title,
5975                 opt_author ? commit->author : "",
5976                 mkdate(&commit->time, opt_date),
5977                 NULL
5978         };
5980         return grep_text(view, text) || grep_refs(commit->refs, view->regex);
5983 static void
5984 main_select(struct view *view, struct line *line)
5986         struct commit *commit = line->data;
5988         string_copy_rev(view->ref, commit->id);
5989         string_copy_rev(ref_commit, view->ref);
5992 static struct view_ops main_ops = {
5993         "commit",
5994         main_argv,
5995         NULL,
5996         main_read,
5997         main_draw,
5998         main_request,
5999         main_grep,
6000         main_select,
6001 };
6004 /*
6005  * Status management
6006  */
6008 /* Whether or not the curses interface has been initialized. */
6009 static bool cursed = FALSE;
6011 /* Terminal hacks and workarounds. */
6012 static bool use_scroll_redrawwin;
6013 static bool use_scroll_status_wclear;
6015 /* The status window is used for polling keystrokes. */
6016 static WINDOW *status_win;
6018 /* Reading from the prompt? */
6019 static bool input_mode = FALSE;
6021 static bool status_empty = FALSE;
6023 /* Update status and title window. */
6024 static void
6025 report(const char *msg, ...)
6027         struct view *view = display[current_view];
6029         if (input_mode)
6030                 return;
6032         if (!view) {
6033                 char buf[SIZEOF_STR];
6034                 va_list args;
6036                 va_start(args, msg);
6037                 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6038                         buf[sizeof(buf) - 1] = 0;
6039                         buf[sizeof(buf) - 2] = '.';
6040                         buf[sizeof(buf) - 3] = '.';
6041                         buf[sizeof(buf) - 4] = '.';
6042                 }
6043                 va_end(args);
6044                 die("%s", buf);
6045         }
6047         if (!status_empty || *msg) {
6048                 va_list args;
6050                 va_start(args, msg);
6052                 wmove(status_win, 0, 0);
6053                 if (view->has_scrolled && use_scroll_status_wclear)
6054                         wclear(status_win);
6055                 if (*msg) {
6056                         vwprintw(status_win, msg, args);
6057                         status_empty = FALSE;
6058                 } else {
6059                         status_empty = TRUE;
6060                 }
6061                 wclrtoeol(status_win);
6062                 wnoutrefresh(status_win);
6064                 va_end(args);
6065         }
6067         update_view_title(view);
6070 static void
6071 init_display(void)
6073         const char *term;
6074         int x, y;
6076         /* Initialize the curses library */
6077         if (isatty(STDIN_FILENO)) {
6078                 cursed = !!initscr();
6079                 opt_tty = stdin;
6080         } else {
6081                 /* Leave stdin and stdout alone when acting as a pager. */
6082                 opt_tty = fopen("/dev/tty", "r+");
6083                 if (!opt_tty)
6084                         die("Failed to open /dev/tty");
6085                 cursed = !!newterm(NULL, opt_tty, opt_tty);
6086         }
6088         if (!cursed)
6089                 die("Failed to initialize curses");
6091         nonl();         /* Disable conversion and detect newlines from input. */
6092         cbreak();       /* Take input chars one at a time, no wait for \n */
6093         noecho();       /* Don't echo input */
6094         leaveok(stdscr, FALSE);
6096         if (has_colors())
6097                 init_colors();
6099         getmaxyx(stdscr, y, x);
6100         status_win = newwin(1, x, y - 1, 0);
6101         if (!status_win)
6102                 die("Failed to create status window");
6104         /* Enable keyboard mapping */
6105         keypad(status_win, TRUE);
6106         wbkgdset(status_win, get_line_attr(LINE_STATUS));
6108 #if defined(NCURSES_VERSION_PATCH) && (NCURSES_VERSION_PATCH >= 20080119)
6109         set_tabsize(opt_tab_size);
6110 #else
6111         TABSIZE = opt_tab_size;
6112 #endif
6114         term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
6115         if (term && !strcmp(term, "gnome-terminal")) {
6116                 /* In the gnome-terminal-emulator, the message from
6117                  * scrolling up one line when impossible followed by
6118                  * scrolling down one line causes corruption of the
6119                  * status line. This is fixed by calling wclear. */
6120                 use_scroll_status_wclear = TRUE;
6121                 use_scroll_redrawwin = FALSE;
6123         } else if (term && !strcmp(term, "xrvt-xpm")) {
6124                 /* No problems with full optimizations in xrvt-(unicode)
6125                  * and aterm. */
6126                 use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
6128         } else {
6129                 /* When scrolling in (u)xterm the last line in the
6130                  * scrolling direction will update slowly. */
6131                 use_scroll_redrawwin = TRUE;
6132                 use_scroll_status_wclear = FALSE;
6133         }
6136 static int
6137 get_input(int prompt_position)
6139         struct view *view;
6140         int i, key, cursor_y, cursor_x;
6142         if (prompt_position)
6143                 input_mode = TRUE;
6145         while (TRUE) {
6146                 bool loading = FALSE;
6148                 foreach_view (view, i) {
6149                         update_view(view);
6150                         if (view_is_displayed(view) && view->has_scrolled &&
6151                             use_scroll_redrawwin)
6152                                 redrawwin(view->win);
6153                         view->has_scrolled = FALSE;
6154                         if (view->pipe)
6155                                 loading = TRUE;
6156                 }
6158                 /* Update the cursor position. */
6159                 if (prompt_position) {
6160                         getbegyx(status_win, cursor_y, cursor_x);
6161                         cursor_x = prompt_position;
6162                 } else {
6163                         view = display[current_view];
6164                         getbegyx(view->win, cursor_y, cursor_x);
6165                         cursor_x = view->width - 1;
6166                         cursor_y += view->lineno - view->offset;
6167                 }
6168                 setsyx(cursor_y, cursor_x);
6170                 /* Refresh, accept single keystroke of input */
6171                 doupdate();
6172                 nodelay(status_win, loading);
6173                 key = wgetch(status_win);
6175                 /* wgetch() with nodelay() enabled returns ERR when
6176                  * there's no input. */
6177                 if (key == ERR) {
6179                 } else if (key == KEY_RESIZE) {
6180                         int height, width;
6182                         getmaxyx(stdscr, height, width);
6184                         wresize(status_win, 1, width);
6185                         mvwin(status_win, height - 1, 0);
6186                         wnoutrefresh(status_win);
6187                         resize_display();
6188                         redraw_display(TRUE);
6190                 } else {
6191                         input_mode = FALSE;
6192                         return key;
6193                 }
6194         }
6197 static char *
6198 prompt_input(const char *prompt, input_handler handler, void *data)
6200         enum input_status status = INPUT_OK;
6201         static char buf[SIZEOF_STR];
6202         size_t pos = 0;
6204         buf[pos] = 0;
6206         while (status == INPUT_OK || status == INPUT_SKIP) {
6207                 int key;
6209                 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6210                 wclrtoeol(status_win);
6212                 key = get_input(pos + 1);
6213                 switch (key) {
6214                 case KEY_RETURN:
6215                 case KEY_ENTER:
6216                 case '\n':
6217                         status = pos ? INPUT_STOP : INPUT_CANCEL;
6218                         break;
6220                 case KEY_BACKSPACE:
6221                         if (pos > 0)
6222                                 buf[--pos] = 0;
6223                         else
6224                                 status = INPUT_CANCEL;
6225                         break;
6227                 case KEY_ESC:
6228                         status = INPUT_CANCEL;
6229                         break;
6231                 default:
6232                         if (pos >= sizeof(buf)) {
6233                                 report("Input string too long");
6234                                 return NULL;
6235                         }
6237                         status = handler(data, buf, key);
6238                         if (status == INPUT_OK)
6239                                 buf[pos++] = (char) key;
6240                 }
6241         }
6243         /* Clear the status window */
6244         status_empty = FALSE;
6245         report("");
6247         if (status == INPUT_CANCEL)
6248                 return NULL;
6250         buf[pos++] = 0;
6252         return buf;
6255 static enum input_status
6256 prompt_yesno_handler(void *data, char *buf, int c)
6258         if (c == 'y' || c == 'Y')
6259                 return INPUT_STOP;
6260         if (c == 'n' || c == 'N')
6261                 return INPUT_CANCEL;
6262         return INPUT_SKIP;
6265 static bool
6266 prompt_yesno(const char *prompt)
6268         char prompt2[SIZEOF_STR];
6270         if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6271                 return FALSE;
6273         return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6276 static enum input_status
6277 read_prompt_handler(void *data, char *buf, int c)
6279         return isprint(c) ? INPUT_OK : INPUT_SKIP;
6282 static char *
6283 read_prompt(const char *prompt)
6285         return prompt_input(prompt, read_prompt_handler, NULL);
6288 static bool prompt_menu(const char *prompt, const struct menu_item *items, int *selected)
6290         enum input_status status = INPUT_OK;
6291         int size = 0;
6293         while (items[size].text)
6294                 size++;
6296         while (status == INPUT_OK) {
6297                 const struct menu_item *item = &items[*selected];
6298                 int key;
6299                 int i;
6301                 mvwprintw(status_win, 0, 0, "%s (%d of %d) ",
6302                           prompt, *selected + 1, size);
6303                 if (item->hotkey)
6304                         wprintw(status_win, "[%c] ", (char) item->hotkey);
6305                 wprintw(status_win, "%s", item->text);
6306                 wclrtoeol(status_win);
6308                 key = get_input(COLS - 1);
6309                 switch (key) {
6310                 case KEY_RETURN:
6311                 case KEY_ENTER:
6312                 case '\n':
6313                         status = INPUT_STOP;
6314                         break;
6316                 case KEY_LEFT:
6317                 case KEY_UP:
6318                         *selected = *selected - 1;
6319                         if (*selected < 0)
6320                                 *selected = size - 1;
6321                         break;
6323                 case KEY_RIGHT:
6324                 case KEY_DOWN:
6325                         *selected = (*selected + 1) % size;
6326                         break;
6328                 case KEY_ESC:
6329                         status = INPUT_CANCEL;
6330                         break;
6332                 default:
6333                         for (i = 0; items[i].text; i++)
6334                                 if (items[i].hotkey == key) {
6335                                         *selected = i;
6336                                         status = INPUT_STOP;
6337                                         break;
6338                                 }
6339                 }
6340         }
6342         /* Clear the status window */
6343         status_empty = FALSE;
6344         report("");
6346         return status != INPUT_CANCEL;
6349 /*
6350  * Repository properties
6351  */
6353 static struct ref **refs = NULL;
6354 static size_t refs_size = 0;
6355 static struct ref *refs_head = NULL;
6357 static struct ref_list **ref_lists = NULL;
6358 static size_t ref_lists_size = 0;
6360 DEFINE_ALLOCATOR(realloc_refs, struct ref *, 256)
6361 DEFINE_ALLOCATOR(realloc_refs_list, struct ref *, 8)
6362 DEFINE_ALLOCATOR(realloc_ref_lists, struct ref_list *, 8)
6364 static int
6365 compare_refs(const void *ref1_, const void *ref2_)
6367         const struct ref *ref1 = *(const struct ref **)ref1_;
6368         const struct ref *ref2 = *(const struct ref **)ref2_;
6370         if (ref1->tag != ref2->tag)
6371                 return ref2->tag - ref1->tag;
6372         if (ref1->ltag != ref2->ltag)
6373                 return ref2->ltag - ref2->ltag;
6374         if (ref1->head != ref2->head)
6375                 return ref2->head - ref1->head;
6376         if (ref1->tracked != ref2->tracked)
6377                 return ref2->tracked - ref1->tracked;
6378         if (ref1->remote != ref2->remote)
6379                 return ref2->remote - ref1->remote;
6380         return strcmp(ref1->name, ref2->name);
6383 static void
6384 foreach_ref(bool (*visitor)(void *data, const struct ref *ref), void *data)
6386         size_t i;
6388         for (i = 0; i < refs_size; i++)
6389                 if (!visitor(data, refs[i]))
6390                         break;
6393 static struct ref *
6394 get_ref_head()
6396         return refs_head;
6399 static struct ref_list *
6400 get_ref_list(const char *id)
6402         struct ref_list *list;
6403         size_t i;
6405         for (i = 0; i < ref_lists_size; i++)
6406                 if (!strcmp(id, ref_lists[i]->id))
6407                         return ref_lists[i];
6409         if (!realloc_ref_lists(&ref_lists, ref_lists_size, 1))
6410                 return NULL;
6411         list = calloc(1, sizeof(*list));
6412         if (!list)
6413                 return NULL;
6415         for (i = 0; i < refs_size; i++) {
6416                 if (!strcmp(id, refs[i]->id) &&
6417                     realloc_refs_list(&list->refs, list->size, 1))
6418                         list->refs[list->size++] = refs[i];
6419         }
6421         if (!list->refs) {
6422                 free(list);
6423                 return NULL;
6424         }
6426         qsort(list->refs, list->size, sizeof(*list->refs), compare_refs);
6427         ref_lists[ref_lists_size++] = list;
6428         return list;
6431 static int
6432 read_ref(char *id, size_t idlen, char *name, size_t namelen, void *data)
6434         struct ref *ref = NULL;
6435         bool tag = FALSE;
6436         bool ltag = FALSE;
6437         bool remote = FALSE;
6438         bool tracked = FALSE;
6439         bool head = FALSE;
6440         int from = 0, to = refs_size - 1;
6442         if (!prefixcmp(name, "refs/tags/")) {
6443                 if (!suffixcmp(name, namelen, "^{}")) {
6444                         namelen -= 3;
6445                         name[namelen] = 0;
6446                 } else {
6447                         ltag = TRUE;
6448                 }
6450                 tag = TRUE;
6451                 namelen -= STRING_SIZE("refs/tags/");
6452                 name    += STRING_SIZE("refs/tags/");
6454         } else if (!prefixcmp(name, "refs/remotes/")) {
6455                 remote = TRUE;
6456                 namelen -= STRING_SIZE("refs/remotes/");
6457                 name    += STRING_SIZE("refs/remotes/");
6458                 tracked  = !strcmp(opt_remote, name);
6460         } else if (!prefixcmp(name, "refs/heads/")) {
6461                 namelen -= STRING_SIZE("refs/heads/");
6462                 name    += STRING_SIZE("refs/heads/");
6463                 if (!strncmp(opt_head, name, namelen))
6464                         return OK;
6466         } else if (!strcmp(name, "HEAD")) {
6467                 head     = TRUE;
6468                 if (*opt_head) {
6469                         namelen  = strlen(opt_head);
6470                         name     = opt_head;
6471                 }
6472         }
6474         /* If we are reloading or it's an annotated tag, replace the
6475          * previous SHA1 with the resolved commit id; relies on the fact
6476          * git-ls-remote lists the commit id of an annotated tag right
6477          * before the commit id it points to. */
6478         while (from <= to) {
6479                 size_t pos = (to + from) / 2;
6480                 int cmp = strcmp(name, refs[pos]->name);
6482                 if (!cmp) {
6483                         ref = refs[pos];
6484                         break;
6485                 }
6487                 if (cmp < 0)
6488                         to = pos - 1;
6489                 else
6490                         from = pos + 1;
6491         }
6493         if (!ref) {
6494                 if (!realloc_refs(&refs, refs_size, 1))
6495                         return ERR;
6496                 ref = calloc(1, sizeof(*ref) + namelen);
6497                 if (!ref)
6498                         return ERR;
6499                 memmove(refs + from + 1, refs + from,
6500                         (refs_size - from) * sizeof(*refs));
6501                 refs[from] = ref;
6502                 strncpy(ref->name, name, namelen);
6503                 refs_size++;
6504         }
6506         ref->head = head;
6507         ref->tag = tag;
6508         ref->ltag = ltag;
6509         ref->remote = remote;
6510         ref->tracked = tracked;
6511         string_copy_rev(ref->id, id);
6513         if (head)
6514                 refs_head = ref;
6515         return OK;
6518 static int
6519 load_refs(void)
6521         const char *head_argv[] = {
6522                 "git", "symbolic-ref", "HEAD", NULL
6523         };
6524         static const char *ls_remote_argv[SIZEOF_ARG] = {
6525                 "git", "ls-remote", opt_git_dir, NULL
6526         };
6527         static bool init = FALSE;
6528         size_t i;
6530         if (!init) {
6531                 if (!argv_from_env(ls_remote_argv, "TIG_LS_REMOTE"))
6532                         die("TIG_LS_REMOTE contains too many arguments");
6533                 init = TRUE;
6534         }
6536         if (!*opt_git_dir)
6537                 return OK;
6539         if (io_run_buf(head_argv, opt_head, sizeof(opt_head)) &&
6540             !prefixcmp(opt_head, "refs/heads/")) {
6541                 char *offset = opt_head + STRING_SIZE("refs/heads/");
6543                 memmove(opt_head, offset, strlen(offset) + 1);
6544         }
6546         refs_head = NULL;
6547         for (i = 0; i < refs_size; i++)
6548                 refs[i]->id[0] = 0;
6550         if (io_run_load(ls_remote_argv, "\t", read_ref, NULL) == ERR)
6551                 return ERR;
6553         /* Update the ref lists to reflect changes. */
6554         for (i = 0; i < ref_lists_size; i++) {
6555                 struct ref_list *list = ref_lists[i];
6556                 size_t old, new;
6558                 for (old = new = 0; old < list->size; old++)
6559                         if (!strcmp(list->id, list->refs[old]->id))
6560                                 list->refs[new++] = list->refs[old];
6561                 list->size = new;
6562         }
6564         return OK;
6567 static void
6568 set_remote_branch(const char *name, const char *value, size_t valuelen)
6570         if (!strcmp(name, ".remote")) {
6571                 string_ncopy(opt_remote, value, valuelen);
6573         } else if (*opt_remote && !strcmp(name, ".merge")) {
6574                 size_t from = strlen(opt_remote);
6576                 if (!prefixcmp(value, "refs/heads/"))
6577                         value += STRING_SIZE("refs/heads/");
6579                 if (!string_format_from(opt_remote, &from, "/%s", value))
6580                         opt_remote[0] = 0;
6581         }
6584 static void
6585 set_repo_config_option(char *name, char *value, enum option_code (*cmd)(int, const char **))
6587         const char *argv[SIZEOF_ARG] = { name, "=" };
6588         int argc = 1 + (cmd == option_set_command);
6589         enum option_code error;
6591         if (!argv_from_string(argv, &argc, value))
6592                 error = OPT_ERR_TOO_MANY_OPTION_ARGUMENTS;
6593         else
6594                 error = cmd(argc, argv);
6596         if (error != OPT_OK)
6597                 warn("Option 'tig.%s': %s", name, option_errors[error]);
6600 static bool
6601 set_environment_variable(const char *name, const char *value)
6603         size_t len = strlen(name) + 1 + strlen(value) + 1;
6604         char *env = malloc(len);
6606         if (env &&
6607             string_nformat(env, len, NULL, "%s=%s", name, value) &&
6608             putenv(env) == 0)
6609                 return TRUE;
6610         free(env);
6611         return FALSE;
6614 static void
6615 set_work_tree(const char *value)
6617         char cwd[SIZEOF_STR];
6619         if (!getcwd(cwd, sizeof(cwd)))
6620                 die("Failed to get cwd path: %s", strerror(errno));
6621         if (chdir(opt_git_dir) < 0)
6622                 die("Failed to chdir(%s): %s", strerror(errno));
6623         if (!getcwd(opt_git_dir, sizeof(opt_git_dir)))
6624                 die("Failed to get git path: %s", strerror(errno));
6625         if (chdir(cwd) < 0)
6626                 die("Failed to chdir(%s): %s", cwd, strerror(errno));
6627         if (chdir(value) < 0)
6628                 die("Failed to chdir(%s): %s", value, strerror(errno));
6629         if (!getcwd(cwd, sizeof(cwd)))
6630                 die("Failed to get cwd path: %s", strerror(errno));
6631         if (!set_environment_variable("GIT_WORK_TREE", cwd))
6632                 die("Failed to set GIT_WORK_TREE to '%s'", cwd);
6633         if (!set_environment_variable("GIT_DIR", opt_git_dir))
6634                 die("Failed to set GIT_DIR to '%s'", opt_git_dir);
6635         opt_is_inside_work_tree = TRUE;
6638 static int
6639 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen, void *data)
6641         if (!strcmp(name, "i18n.commitencoding"))
6642                 string_ncopy(opt_encoding, value, valuelen);
6644         else if (!strcmp(name, "core.editor"))
6645                 string_ncopy(opt_editor, value, valuelen);
6647         else if (!strcmp(name, "core.worktree"))
6648                 set_work_tree(value);
6650         else if (!prefixcmp(name, "tig.color."))
6651                 set_repo_config_option(name + 10, value, option_color_command);
6653         else if (!prefixcmp(name, "tig.bind."))
6654                 set_repo_config_option(name + 9, value, option_bind_command);
6656         else if (!prefixcmp(name, "tig."))
6657                 set_repo_config_option(name + 4, value, option_set_command);
6659         else if (*opt_head && !prefixcmp(name, "branch.") &&
6660                  !strncmp(name + 7, opt_head, strlen(opt_head)))
6661                 set_remote_branch(name + 7 + strlen(opt_head), value, valuelen);
6663         return OK;
6666 static int
6667 load_git_config(void)
6669         const char *config_list_argv[] = { "git", "config", "--list", NULL };
6671         return io_run_load(config_list_argv, "=", read_repo_config_option, NULL);
6674 static int
6675 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen, void *data)
6677         if (!opt_git_dir[0]) {
6678                 string_ncopy(opt_git_dir, name, namelen);
6680         } else if (opt_is_inside_work_tree == -1) {
6681                 /* This can be 3 different values depending on the
6682                  * version of git being used. If git-rev-parse does not
6683                  * understand --is-inside-work-tree it will simply echo
6684                  * the option else either "true" or "false" is printed.
6685                  * Default to true for the unknown case. */
6686                 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6688         } else if (*name == '.') {
6689                 string_ncopy(opt_cdup, name, namelen);
6691         } else {
6692                 string_ncopy(opt_prefix, name, namelen);
6693         }
6695         return OK;
6698 static int
6699 load_repo_info(void)
6701         const char *rev_parse_argv[] = {
6702                 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6703                         "--show-cdup", "--show-prefix", NULL
6704         };
6706         return io_run_load(rev_parse_argv, "=", read_repo_info, NULL);
6710 /*
6711  * Main
6712  */
6714 static const char usage[] =
6715 "tig " TIG_VERSION " (" __DATE__ ")\n"
6716 "\n"
6717 "Usage: tig        [options] [revs] [--] [paths]\n"
6718 "   or: tig show   [options] [revs] [--] [paths]\n"
6719 "   or: tig blame  [options] [rev] [--] path\n"
6720 "   or: tig status\n"
6721 "   or: tig <      [git command output]\n"
6722 "\n"
6723 "Options:\n"
6724 "  -v, --version   Show version and exit\n"
6725 "  -h, --help      Show help message and exit";
6727 static void __NORETURN
6728 quit(int sig)
6730         /* XXX: Restore tty modes and let the OS cleanup the rest! */
6731         if (cursed)
6732                 endwin();
6733         exit(0);
6736 static void __NORETURN
6737 die(const char *err, ...)
6739         va_list args;
6741         endwin();
6743         va_start(args, err);
6744         fputs("tig: ", stderr);
6745         vfprintf(stderr, err, args);
6746         fputs("\n", stderr);
6747         va_end(args);
6749         exit(1);
6752 static void
6753 warn(const char *msg, ...)
6755         va_list args;
6757         va_start(args, msg);
6758         fputs("tig warning: ", stderr);
6759         vfprintf(stderr, msg, args);
6760         fputs("\n", stderr);
6761         va_end(args);
6764 static int
6765 read_filter_args(char *name, size_t namelen, char *value, size_t valuelen, void *data)
6767         const char ***filter_args = data;
6769         return argv_append(filter_args, name) ? OK : ERR;
6772 static void
6773 filter_rev_parse(const char ***args, const char *arg1, const char *arg2, const char *argv[])
6775         const char *rev_parse_argv[SIZEOF_ARG] = { "git", "rev-parse", arg1, arg2 };
6776         const char **all_argv = NULL;
6778         if (!argv_append_array(&all_argv, rev_parse_argv) ||
6779             !argv_append_array(&all_argv, argv) ||
6780             !io_run_load(all_argv, "\n", read_filter_args, args) == ERR)
6781                 die("Failed to split arguments");
6782         argv_free(all_argv);
6783         free(all_argv);
6786 static void
6787 filter_options(const char *argv[])
6789         filter_rev_parse(&opt_file_argv, "--no-revs", "--no-flags", argv);
6790         filter_rev_parse(&opt_diff_argv, "--no-revs", "--flags", argv);
6791         filter_rev_parse(&opt_rev_argv, "--symbolic", "--revs-only", argv);
6794 static enum request
6795 parse_options(int argc, const char *argv[])
6797         enum request request = REQ_VIEW_MAIN;
6798         const char *subcommand;
6799         bool seen_dashdash = FALSE;
6800         const char **filter_argv = NULL;
6801         int i;
6803         if (!isatty(STDIN_FILENO))
6804                 return REQ_VIEW_PAGER;
6806         if (argc <= 1)
6807                 return REQ_VIEW_MAIN;
6809         subcommand = argv[1];
6810         if (!strcmp(subcommand, "status")) {
6811                 if (argc > 2)
6812                         warn("ignoring arguments after `%s'", subcommand);
6813                 return REQ_VIEW_STATUS;
6815         } else if (!strcmp(subcommand, "blame")) {
6816                 filter_rev_parse(&opt_file_argv, "--no-revs", "--no-flags", argv + 2);
6817                 filter_rev_parse(&opt_blame_argv, "--no-revs", "--flags", argv + 2);
6818                 filter_rev_parse(&opt_rev_argv, "--symbolic", "--revs-only", argv + 2);
6820                 if (!opt_file_argv || opt_file_argv[1] || (opt_rev_argv && opt_rev_argv[1]))
6821                         die("invalid number of options to blame\n\n%s", usage);
6823                 if (opt_rev_argv) {
6824                         string_ncopy(opt_ref, opt_rev_argv[0], strlen(opt_rev_argv[0]));
6825                 }
6827                 string_ncopy(opt_file, opt_file_argv[0], strlen(opt_file_argv[0]));
6828                 return REQ_VIEW_BLAME;
6830         } else if (!strcmp(subcommand, "show")) {
6831                 request = REQ_VIEW_DIFF;
6833         } else {
6834                 subcommand = NULL;
6835         }
6837         for (i = 1 + !!subcommand; i < argc; i++) {
6838                 const char *opt = argv[i];
6840                 if (seen_dashdash) {
6841                         argv_append(&opt_file_argv, opt);
6842                         continue;
6844                 } else if (!strcmp(opt, "--")) {
6845                         seen_dashdash = TRUE;
6846                         continue;
6848                 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
6849                         printf("tig version %s\n", TIG_VERSION);
6850                         quit(0);
6852                 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
6853                         printf("%s\n", usage);
6854                         quit(0);
6856                 } else if (!strcmp(opt, "--all")) {
6857                         argv_append(&opt_rev_argv, opt);
6858                         continue;
6859                 }
6861                 if (!argv_append(&filter_argv, opt))
6862                         die("command too long");
6863         }
6865         if (filter_argv)
6866                 filter_options(filter_argv);
6868         return request;
6871 int
6872 main(int argc, const char *argv[])
6874         const char *codeset = "UTF-8";
6875         enum request request = parse_options(argc, argv);
6876         struct view *view;
6877         size_t i;
6879         signal(SIGINT, quit);
6880         signal(SIGPIPE, SIG_IGN);
6882         if (setlocale(LC_ALL, "")) {
6883                 codeset = nl_langinfo(CODESET);
6884         }
6886         if (load_repo_info() == ERR)
6887                 die("Failed to load repo info.");
6889         if (load_options() == ERR)
6890                 die("Failed to load user config.");
6892         if (load_git_config() == ERR)
6893                 die("Failed to load repo config.");
6895         /* Require a git repository unless when running in pager mode. */
6896         if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6897                 die("Not a git repository");
6899         if (*opt_encoding && strcmp(codeset, "UTF-8")) {
6900                 opt_iconv_in = iconv_open("UTF-8", opt_encoding);
6901                 if (opt_iconv_in == ICONV_NONE)
6902                         die("Failed to initialize character set conversion");
6903         }
6905         if (codeset && strcmp(codeset, "UTF-8")) {
6906                 opt_iconv_out = iconv_open(codeset, "UTF-8");
6907                 if (opt_iconv_out == ICONV_NONE)
6908                         die("Failed to initialize character set conversion");
6909         }
6911         if (load_refs() == ERR)
6912                 die("Failed to load refs.");
6914         foreach_view (view, i) {
6915                 if (getenv(view->cmd_env))
6916                         warn("Use of the %s environment variable is deprecated,"
6917                              " use options or TIG_DIFF_ARGS instead",
6918                              view->cmd_env);
6919                 if (!argv_from_env(view->ops->argv, view->cmd_env))
6920                         die("Too many arguments in the `%s` environment variable",
6921                             view->cmd_env);
6922         }
6924         init_display();
6926         while (view_driver(display[current_view], request)) {
6927                 int key = get_input(0);
6929                 view = display[current_view];
6930                 request = get_keybinding(view->keymap, key);
6932                 /* Some low-level request handling. This keeps access to
6933                  * status_win restricted. */
6934                 switch (request) {
6935                 case REQ_NONE:
6936                         report("Unknown key, press %s for help",
6937                                get_key(view->keymap, REQ_VIEW_HELP));
6938                         break;
6939                 case REQ_PROMPT:
6940                 {
6941                         char *cmd = read_prompt(":");
6943                         if (cmd && isdigit(*cmd)) {
6944                                 int lineno = view->lineno + 1;
6946                                 if (parse_int(&lineno, cmd, 1, view->lines + 1) == OK) {
6947                                         select_view_line(view, lineno - 1);
6948                                         report("");
6949                                 } else {
6950                                         report("Unable to parse '%s' as a line number", cmd);
6951                                 }
6953                         } else if (cmd) {
6954                                 struct view *next = VIEW(REQ_VIEW_PAGER);
6955                                 const char *argv[SIZEOF_ARG] = { "git" };
6956                                 int argc = 1;
6958                                 /* When running random commands, initially show the
6959                                  * command in the title. However, it maybe later be
6960                                  * overwritten if a commit line is selected. */
6961                                 string_ncopy(next->ref, cmd, strlen(cmd));
6963                                 if (!argv_from_string(argv, &argc, cmd)) {
6964                                         report("Too many arguments");
6965                                 } else if (!prepare_update(next, argv, NULL)) {
6966                                         report("Failed to format command");
6967                                 } else {
6968                                         open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6969                                 }
6970                         }
6972                         request = REQ_NONE;
6973                         break;
6974                 }
6975                 case REQ_SEARCH:
6976                 case REQ_SEARCH_BACK:
6977                 {
6978                         const char *prompt = request == REQ_SEARCH ? "/" : "?";
6979                         char *search = read_prompt(prompt);
6981                         if (search)
6982                                 string_ncopy(opt_search, search, strlen(search));
6983                         else if (*opt_search)
6984                                 request = request == REQ_SEARCH ?
6985                                         REQ_FIND_NEXT :
6986                                         REQ_FIND_PREV;
6987                         else
6988                                 request = REQ_NONE;
6989                         break;
6990                 }
6991                 default:
6992                         break;
6993                 }
6994         }
6996         quit(0);
6998         return 0;