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nsxivmain.c

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1/* Copyright 2011-2013 Bert Muennich
2 *
3 * This file is part of sxiv.
4 *
5 * sxiv is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published
7 * by the Free Software Foundation; either version 2 of the License,
8 * or (at your option) any later version.
9 *
10 * sxiv is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with sxiv. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19#define _POSIX_C_SOURCE 200112L
20#define _MAPPINGS_CONFIG
21
22#include <stdlib.h>
23#include <stdio.h>
24#include <string.h>
25#include <fcntl.h>
26#include <unistd.h>
27#include <errno.h>
28#include <signal.h>
29#include <sys/select.h>
30#include <sys/stat.h>
31#include <sys/time.h>
32#include <sys/wait.h>
33#include <X11/keysym.h>
34
35#include "types.h"
36#include "commands.h"
37#include "image.h"
38#include "options.h"
39#include "thumbs.h"
40#include "util.h"
41#include "window.h"
42#include "config.h"
43
44enum {
45 FILENAME_CNT = 1024,
46 TITLE_LEN = 256
47};
48
49typedef struct {
50 struct timeval when;
51 bool active;
52 timeout_f handler;
53} timeout_t;
54
55/* timeout handler functions: */
56void redraw(void);
57void reset_cursor(void);
58void animate(void);
59void clear_resize(void);
60
61appmode_t mode;
62img_t img;
63tns_t tns;
64win_t win;
65
66fileinfo_t *files;
67int filecnt, fileidx;
68int alternate;
69
70int prefix;
71
72bool resized = false;
73
74const char * const INFO_SCRIPT = ".sxiv/exec/image-info";
75struct {
76 char *script;
77 int fd;
78 unsigned int i, lastsep;
79 bool open;
80} info;
81
82timeout_t timeouts[] = {
83 { { 0, 0 }, false, redraw },
84 { { 0, 0 }, false, reset_cursor },
85 { { 0, 0 }, false, animate },
86 { { 0, 0 }, false, clear_resize },
87};
88
89void cleanup(void)
90{
91 static bool in = false;
92
93 if (!in) {
94 in = true;
95 img_close(&img, false);
96 tns_free(&tns);
97 win_close(&win);
98 }
99}
100
101void check_add_file(char *filename)
102{
103 const char *bn;
104
105 if (filename == NULL || *filename == '\0')
106 return;
107
108 if (access(filename, R_OK) < 0) {
109 warn("could not open file: %s", filename);
110 return;
111 }
112
113 if (fileidx == filecnt) {
114 filecnt *= 2;
115 files = (fileinfo_t*) s_realloc(files, filecnt * sizeof(fileinfo_t));
116 }
117 if (*filename != '/') {
118 files[fileidx].path = absolute_path(filename);
119 if (files[fileidx].path == NULL) {
120 warn("could not get absolute path of file: %s\n", filename);
121 return;
122 }
123 }
124 files[fileidx].loaded = false;
125 files[fileidx].name = s_strdup(filename);
126 if (*filename == '/')
127 files[fileidx].path = files[fileidx].name;
128 if ((bn = strrchr(files[fileidx].name , '/')) != NULL && bn[1] != '\0')
129 files[fileidx].base = ++bn;
130 else
131 files[fileidx].base = files[fileidx].name;
132 fileidx++;
133}
134
135void remove_file(int n, bool manual)
136{
137 if (n < 0 || n >= filecnt)
138 return;
139
140 if (filecnt == 1) {
141 if (!manual)
142 fprintf(stderr, "sxiv: no more files to display, aborting\n");
143 cleanup();
144 exit(manual ? EXIT_SUCCESS : EXIT_FAILURE);
145 }
146
147 if (files[n].path != files[n].name)
148 free((void*) files[n].path);
149 free((void*) files[n].name);
150
151 if (n + 1 < filecnt)
152 memmove(files + n, files + n + 1, (filecnt - n - 1) * sizeof(fileinfo_t));
153 if (n + 1 < tns.cnt) {
154 memmove(tns.thumbs + n, tns.thumbs + n + 1, (tns.cnt - n - 1) *
155 sizeof(thumb_t));
156 memset(tns.thumbs + tns.cnt - 1, 0, sizeof(thumb_t));
157 }
158
159 filecnt--;
160 if (n < tns.cnt)
161 tns.cnt--;
162}
163
164void set_timeout(timeout_f handler, int time, bool overwrite)
165{
166 int i;
167
168 for (i = 0; i < ARRLEN(timeouts); i++) {
169 if (timeouts[i].handler == handler) {
170 if (!timeouts[i].active || overwrite) {
171 gettimeofday(&timeouts[i].when, 0);
172 TV_ADD_MSEC(&timeouts[i].when, time);
173 timeouts[i].active = true;
174 }
175 return;
176 }
177 }
178}
179
180void reset_timeout(timeout_f handler)
181{
182 int i;
183
184 for (i = 0; i < ARRLEN(timeouts); i++) {
185 if (timeouts[i].handler == handler) {
186 timeouts[i].active = false;
187 return;
188 }
189 }
190}
191
192bool check_timeouts(struct timeval *t)
193{
194 int i = 0, tdiff, tmin = -1;
195 struct timeval now;
196
197 while (i < ARRLEN(timeouts)) {
198 if (timeouts[i].active) {
199 gettimeofday(&now, 0);
200 tdiff = TV_DIFF(&timeouts[i].when, &now);
201 if (tdiff <= 0) {
202 timeouts[i].active = false;
203 if (timeouts[i].handler != NULL)
204 timeouts[i].handler();
205 i = tmin = -1;
206 } else if (tmin < 0 || tdiff < tmin) {
207 tmin = tdiff;
208 }
209 }
210 i++;
211 }
212 if (tmin > 0 && t != NULL)
213 TV_SET_MSEC(t, tmin);
214 return tmin > 0;
215}
216
217void open_info(void)
218{
219 static pid_t pid;
220 int pfd[2];
221
222 if (info.script == NULL || info.open || win.bar.h == 0)
223 return;
224 if (info.fd != -1) {
225 close(info.fd);
226 kill(pid, SIGTERM);
227 info.fd = -1;
228 }
229 win.bar.l[0] = '\0';
230
231 if (pipe(pfd) < 0)
232 return;
233 pid = fork();
234 if (pid > 0) {
235 close(pfd[1]);
236 fcntl(pfd[0], F_SETFL, O_NONBLOCK);
237 info.fd = pfd[0];
238 info.i = info.lastsep = 0;
239 info.open = true;
240 } else if (pid == 0) {
241 close(pfd[0]);
242 dup2(pfd[1], 1);
243 execl(info.script, info.script, files[fileidx].name, NULL);
244 warn("could not exec: %s", info.script);
245 exit(EXIT_FAILURE);
246 }
247}
248
249void read_info(void)
250{
251 ssize_t i, n;
252 char buf[BAR_L_LEN];
253
254 while (true) {
255 n = read(info.fd, buf, sizeof(buf));
256 if (n < 0 && errno == EAGAIN)
257 return;
258 else if (n == 0)
259 goto end;
260 for (i = 0; i < n; i++) {
261 if (buf[i] == '\n') {
262 if (info.lastsep == 0) {
263 win.bar.l[info.i++] = ' ';
264 info.lastsep = 1;
265 }
266 } else {
267 win.bar.l[info.i++] = buf[i];
268 info.lastsep = 0;
269 }
270 if (info.i + 1 == sizeof(win.bar.l))
271 goto end;
272 }
273 }
274end:
275 info.i -= info.lastsep;
276 win.bar.l[info.i] = '\0';
277 win_update_bar(&win);
278 info.fd = -1;
279 while (waitpid(-1, NULL, WNOHANG) > 0);
280}
281
282void load_image(int new)
283{
284 if (new < 0 || new >= filecnt)
285 return;
286
287 win_set_cursor(&win, CURSOR_WATCH);
288
289 img_close(&img, false);
290 while (!img_load(&img, &files[new])) {
291 remove_file(new, false);
292 if (new >= filecnt)
293 new = filecnt - 1;
294 }
295
296 files[new].loaded = true;
297 alternate = fileidx;
298 fileidx = new;
299
300 info.open = false;
301 open_info();
302
303 if (img.multi.cnt > 0 && img.multi.animate)
304 set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
305 else
306 reset_timeout(animate);
307}
308
309void update_info(void)
310{
311 int sel;
312 unsigned int i, fn, fw, n;
313 unsigned int llen = sizeof(win.bar.l), rlen = sizeof(win.bar.r);
314 char *lt = win.bar.l, *rt = win.bar.r, title[TITLE_LEN];
315 bool ow_info;
316
317 for (fw = 0, i = filecnt; i > 0; fw++, i /= 10);
318 sel = mode == MODE_IMAGE ? fileidx : tns.sel;
319
320 /* update window title */
321 if (mode == MODE_THUMB) {
322 win_set_title(&win, "sxiv");
323 } else {
324 snprintf(title, sizeof(title), "sxiv - %s", files[sel].name);
325 win_set_title(&win, title);
326 }
327
328 /* update bar contents */
329 if (win.bar.h == 0)
330 return;
331 if (mode == MODE_THUMB) {
332 if (tns.cnt == filecnt) {
333 n = snprintf(rt, rlen, "%0*d/%d", fw, sel + 1, filecnt);
334 ow_info = true;
335 } else {
336 snprintf(lt, llen, "Loading... %0*d/%d", fw, tns.cnt, filecnt);
337 rt[0] = '\0';
338 ow_info = false;
339 }
340 } else {
341 n = snprintf(rt, rlen, "%3d%% | ", (int) (img.zoom * 100.0));
342 if (img.multi.cnt > 0) {
343 for (fn = 0, i = img.multi.cnt; i > 0; fn++, i /= 10);
344 n += snprintf(rt + n, rlen - n, "%0*d/%d | ",
345 fn, img.multi.sel + 1, img.multi.cnt);
346 }
347 n += snprintf(rt + n, rlen - n, "%0*d/%d", fw, sel + 1, filecnt);
348 ow_info = info.script == NULL;
349 }
350 if (ow_info) {
351 fn = strlen(files[sel].name);
352 if (fn < llen &&
353 win_textwidth(files[sel].name, fn, true) +
354 win_textwidth(rt, n, true) < win.w)
355 {
356 strncpy(lt, files[sel].name, llen);
357 } else {
358 strncpy(lt, files[sel].base, llen);
359 }
360 }
361}
362
363void redraw(void)
364{
365 if (mode == MODE_IMAGE)
366 img_render(&img);
367 else
368 tns_render(&tns);
369 update_info();
370 win_draw(&win);
371 reset_timeout(redraw);
372 reset_cursor();
373}
374
375void reset_cursor(void)
376{
377 int i;
378 cursor_t cursor = CURSOR_NONE;
379
380 if (mode == MODE_IMAGE) {
381 for (i = 0; i < ARRLEN(timeouts); i++) {
382 if (timeouts[i].handler == reset_cursor) {
383 if (timeouts[i].active)
384 cursor = CURSOR_ARROW;
385 break;
386 }
387 }
388 } else {
389 if (tns.cnt != filecnt)
390 cursor = CURSOR_WATCH;
391 else
392 cursor = CURSOR_ARROW;
393 }
394 win_set_cursor(&win, cursor);
395}
396
397void animate(void)
398{
399 if (img_frame_animate(&img, false)) {
400 redraw();
401 set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
402 }
403}
404
405void clear_resize(void)
406{
407 resized = false;
408}
409
410bool keymask(const keymap_t *k, unsigned int state)
411{
412 return (k->ctrl ? ControlMask : 0) == (state & ControlMask);
413}
414
415bool buttonmask(const button_t *b, unsigned int state)
416{
417 return ((b->ctrl ? ControlMask : 0) | (b->shift ? ShiftMask : 0)) ==
418 (state & (ControlMask | ShiftMask));
419}
420
421void on_keypress(XKeyEvent *kev)
422{
423 int i;
424 KeySym ksym;
425 char key;
426
427 if (kev == NULL)
428 return;
429
430 XLookupString(kev, &key, 1, &ksym, NULL);
431
432 if ((ksym == XK_Escape || (key >= '0' && key <= '9')) &&
433 (kev->state & ControlMask) == 0)
434 {
435 /* number prefix for commands */
436 prefix = ksym == XK_Escape ? 0 : prefix * 10 + (int) (key - '0');
437 return;
438 }
439
440 for (i = 0; i < ARRLEN(keys); i++) {
441 if (keys[i].ksym == ksym && keymask(&keys[i], kev->state)) {
442 if (keys[i].cmd != NULL && keys[i].cmd(keys[i].arg))
443 redraw();
444 prefix = 0;
445 return;
446 }
447 }
448}
449
450void on_buttonpress(XButtonEvent *bev)
451{
452 int i, sel;
453
454 if (bev == NULL)
455 return;
456
457 if (mode == MODE_IMAGE) {
458 win_set_cursor(&win, CURSOR_ARROW);
459 set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
460
461 for (i = 0; i < ARRLEN(buttons); i++) {
462 if (buttons[i].button == bev->button &&
463 buttonmask(&buttons[i], bev->state))
464 {
465 if (buttons[i].cmd != NULL && buttons[i].cmd(buttons[i].arg))
466 redraw();
467 return;
468 }
469 }
470 } else {
471 /* thumbnail mode (hard-coded) */
472 switch (bev->button) {
473 case Button1:
474 if ((sel = tns_translate(&tns, bev->x, bev->y)) >= 0) {
475 if (sel == tns.sel) {
476 mode = MODE_IMAGE;
477 set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
478 load_image(tns.sel);
479 } else {
480 tns_highlight(&tns, tns.sel, false);
481 tns_highlight(&tns, sel, true);
482 tns.sel = sel;
483 }
484 redraw();
485 break;
486 }
487 break;
488 case Button4:
489 case Button5:
490 if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN,
491 (bev->state & ControlMask) != 0))
492 redraw();
493 break;
494 }
495 }
496}
497
498void run(void)
499{
500 int xfd;
501 fd_set fds;
502 struct timeval timeout;
503 bool discard, to_set;
504 XEvent ev, nextev;
505
506 redraw();
507
508 while (true) {
509 while (mode == MODE_THUMB && tns.cnt < filecnt &&
510 XPending(win.env.dpy) == 0)
511 {
512 /* load thumbnails */
513 set_timeout(redraw, TO_REDRAW_THUMBS, false);
514 if (tns_load(&tns, tns.cnt, &files[tns.cnt], false, false)) {
515 tns.cnt++;
516 } else {
517 remove_file(tns.cnt, false);
518 if (tns.sel >= tns.cnt)
519 tns.sel--;
520 }
521 if (tns.cnt == filecnt)
522 redraw();
523 else
524 check_timeouts(NULL);
525 }
526
527 while (XPending(win.env.dpy) == 0
528 && ((to_set = check_timeouts(&timeout)) || info.fd != -1))
529 {
530 /* check for timeouts & input */
531 xfd = ConnectionNumber(win.env.dpy);
532 FD_ZERO(&fds);
533 FD_SET(xfd, &fds);
534 if (info.fd != -1) {
535 FD_SET(info.fd, &fds);
536 xfd = MAX(xfd, info.fd);
537 }
538 select(xfd + 1, &fds, 0, 0, to_set ? &timeout : NULL);
539 if (info.fd != -1 && FD_ISSET(info.fd, &fds))
540 read_info();
541 }
542
543 do {
544 XNextEvent(win.env.dpy, &ev);
545 discard = false;
546 if (XEventsQueued(win.env.dpy, QueuedAlready) > 0) {
547 XPeekEvent(win.env.dpy, &nextev);
548 switch (ev.type) {
549 case ConfigureNotify:
550 discard = ev.type == nextev.type;
551 break;
552 case KeyPress:
553 discard = (nextev.type == KeyPress || nextev.type == KeyRelease)
554 && ev.xkey.keycode == nextev.xkey.keycode;
555 break;
556 }
557 }
558 } while (discard);
559
560 switch (ev.type) {
561 /* handle events */
562 case ButtonPress:
563 on_buttonpress(&ev.xbutton);
564 break;
565 case ClientMessage:
566 if ((Atom) ev.xclient.data.l[0] == wm_delete_win)
567 return;
568 break;
569 case ConfigureNotify:
570 if (win_configure(&win, &ev.xconfigure)) {
571 if (mode == MODE_IMAGE) {
572 img.dirty = true;
573 img.checkpan = true;
574 } else {
575 tns.dirty = true;
576 }
577 if (!resized || win.fullscreen) {
578 redraw();
579 set_timeout(clear_resize, TO_REDRAW_RESIZE, false);
580 resized = true;
581 } else {
582 set_timeout(redraw, TO_REDRAW_RESIZE, false);
583 }
584 }
585 break;
586 case Expose:
587 win_expose(&win, &ev.xexpose);
588 break;
589 case KeyPress:
590 on_keypress(&ev.xkey);
591 break;
592 case MotionNotify:
593 if (mode == MODE_IMAGE) {
594 win_set_cursor(&win, CURSOR_ARROW);
595 set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
596 }
597 break;
598 }
599 }
600}
601
602int fncmp(const void *a, const void *b)
603{
604 return strcoll(((fileinfo_t*) a)->name, ((fileinfo_t*) b)->name);
605}
606
607int main(int argc, char **argv)
608{
609 int i, start;
610 size_t n;
611 ssize_t len;
612 char *filename;
613 const char *homedir;
614 struct stat fstats;
615 r_dir_t dir;
616
617 parse_options(argc, argv);
618
619 if (options->clean_cache) {
620 tns_init(&tns, 0, NULL);
621 tns_clean_cache(&tns);
622 exit(EXIT_SUCCESS);
623 }
624
625 if (options->filecnt == 0 && !options->from_stdin) {
626 print_usage();
627 exit(EXIT_FAILURE);
628 }
629
630 if (options->recursive || options->from_stdin)
631 filecnt = FILENAME_CNT;
632 else
633 filecnt = options->filecnt;
634
635 files = (fileinfo_t*) s_malloc(filecnt * sizeof(fileinfo_t));
636 fileidx = 0;
637
638 if (options->from_stdin) {
639 filename = NULL;
640 while ((len = get_line(&filename, &n, stdin)) > 0) {
641 if (filename[len-1] == '\n')
642 filename[len-1] = '\0';
643 check_add_file(filename);
644 }
645 if (filename != NULL)
646 free(filename);
647 }
648
649 for (i = 0; i < options->filecnt; i++) {
650 filename = options->filenames[i];
651
652 if (stat(filename, &fstats) < 0) {
653 warn("could not stat file: %s", filename);
654 continue;
655 }
656 if (!S_ISDIR(fstats.st_mode)) {
657 check_add_file(filename);
658 } else {
659 if (!options->recursive) {
660 warn("ignoring directory: %s", filename);
661 continue;
662 }
663 if (r_opendir(&dir, filename) < 0) {
664 warn("could not open directory: %s", filename);
665 continue;
666 }
667 start = fileidx;
668 while ((filename = r_readdir(&dir)) != NULL) {
669 check_add_file(filename);
670 free((void*) filename);
671 }
672 r_closedir(&dir);
673 if (fileidx - start > 1)
674 qsort(files + start, fileidx - start, sizeof(fileinfo_t), fncmp);
675 }
676 }
677
678 if (fileidx == 0) {
679 fprintf(stderr, "sxiv: no valid image file given, aborting\n");
680 exit(EXIT_FAILURE);
681 }
682
683 filecnt = fileidx;
684 fileidx = options->startnum < filecnt ? options->startnum : 0;
685
686 win_init(&win);
687 img_init(&img, &win);
688
689 if ((homedir = getenv("HOME")) == NULL) {
690 warn("could not locate home directory");
691 } else {
692 len = strlen(homedir) + strlen(INFO_SCRIPT) + 2;
693 info.script = (char*) s_malloc(len);
694 snprintf(info.script, len, "%s/%s", homedir, INFO_SCRIPT);
695 if (access(info.script, X_OK) != 0) {
696 free(info.script);
697 info.script = NULL;
698 }
699 }
700 info.fd = -1;
701
702 if (options->thumb_mode) {
703 mode = MODE_THUMB;
704 tns_init(&tns, filecnt, &win);
705 while (!tns_load(&tns, 0, &files[0], false, false))
706 remove_file(0, false);
707 tns.cnt = 1;
708 } else {
709 mode = MODE_IMAGE;
710 tns.thumbs = NULL;
711 load_image(fileidx);
712 }
713
714 win_open(&win);
715
716 run();
717 cleanup();
718
719 return 0;
720}