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nsxivmain.c

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1/* sxiv: main.c
2 * Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <string.h>
22#include <dirent.h>
23#include <sys/select.h>
24#include <sys/stat.h>
25#include <sys/time.h>
26#include <sys/wait.h>
27#include <unistd.h>
28
29#include <X11/Xlib.h>
30#include <X11/Xutil.h>
31#include <X11/keysym.h>
32
33#include "config.h"
34#include "image.h"
35#include "options.h"
36#include "thumbs.h"
37#include "util.h"
38#include "window.h"
39
40#ifdef EXT_COMMANDS
41#include "commands.h"
42#endif
43
44typedef enum {
45 MODE_NORMAL = 0,
46 MODE_THUMBS
47} appmode_t;
48
49void update_title();
50int check_append(const char*);
51void read_dir_rec(const char*);
52void run();
53
54appmode_t mode;
55img_t img;
56tns_t tns;
57win_t win;
58
59#define DNAME_CNT 512
60#define FNAME_CNT 1024
61const char **filenames;
62int filecnt, fileidx;
63size_t filesize;
64
65#define TITLE_LEN 256
66char win_title[TITLE_LEN];
67
68void cleanup() {
69 static int in = 0;
70
71 if (!in++) {
72 img_close(&img, 0);
73 img_free(&img);
74 tns_free(&tns, &win);
75 win_close(&win);
76 }
77}
78
79int load_image(int new) {
80 struct stat fstats;
81
82 if (new >= 0 && new < filecnt) {
83 img_close(&img, 0);
84 fileidx = new;
85 if (!stat(filenames[fileidx], &fstats))
86 filesize = fstats.st_size;
87 else
88 filesize = 0;
89 return img_load(&img, filenames[fileidx]);
90 } else {
91 return 0;
92 }
93}
94
95int main(int argc, char **argv) {
96 int i;
97 const char *filename;
98 struct stat fstats;
99
100 parse_options(argc, argv);
101
102 if (!options->filecnt) {
103 print_usage();
104 exit(1);
105 }
106
107 if (options->recursive || options->from_stdin)
108 filecnt = FNAME_CNT;
109 else
110 filecnt = options->filecnt;
111
112 filenames = (const char**) s_malloc(filecnt * sizeof(const char*));
113 fileidx = 0;
114
115 if (options->from_stdin) {
116 while ((filename = readline(stdin))) {
117 if (!*filename || !check_append(filename))
118 free((void*) filename);
119 }
120 } else {
121 for (i = 0; i < options->filecnt; ++i) {
122 filename = options->filenames[i];
123 if (!stat(filename, &fstats) && S_ISDIR(fstats.st_mode)) {
124 if (options->recursive)
125 read_dir_rec(filename);
126 else
127 warn("ignoring directory: %s", filename);
128 } else {
129 check_append(filename);
130 }
131 }
132 }
133
134 filecnt = fileidx;
135 fileidx = 0;
136
137 if (!filecnt) {
138 fprintf(stderr, "sxiv: no valid image filename given, aborting\n");
139 exit(1);
140 }
141
142 win_open(&win);
143 img_init(&img, &win);
144
145 if (options->thumbnails) {
146 mode = MODE_THUMBS;
147 tns_init(&tns, filecnt);
148 win_clear(&win);
149 win_draw(&win);
150 } else {
151 mode = MODE_NORMAL;
152 tns.thumbs = NULL;
153 load_image(fileidx);
154 img_render(&img, &win);
155 }
156
157 update_title();
158 run();
159 cleanup();
160
161 return 0;
162}
163
164void update_title() {
165 int n;
166 float size;
167 const char *unit;
168
169 if (mode == MODE_THUMBS) {
170 n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] %s",
171 tns.cnt ? tns.sel + 1 : 0, tns.cnt,
172 tns.cnt ? filenames[tns.sel] : "");
173 } else {
174 if (img.im) {
175 size = filesize;
176 size_readable(&size, &unit);
177 n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] <%d%%> (%.2f%s) %s",
178 fileidx + 1, filecnt, (int) (img.zoom * 100.0), size, unit,
179 filenames[fileidx]);
180 } else {
181 n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] broken: %s",
182 fileidx + 1, filecnt, filenames[fileidx]);
183 }
184 }
185
186 if (n >= TITLE_LEN) {
187 win_title[TITLE_LEN - 2] = '.';
188 win_title[TITLE_LEN - 3] = '.';
189 win_title[TITLE_LEN - 4] = '.';
190 }
191
192 win_set_title(&win, win_title);
193}
194
195int check_append(const char *filename) {
196 if (!filename)
197 return 0;
198
199 if (img_check(filename)) {
200 if (fileidx == filecnt) {
201 filecnt *= 2;
202 filenames = (const char**) s_realloc(filenames,
203 filecnt * sizeof(const char*));
204 }
205 filenames[fileidx++] = filename;
206 return 1;
207 } else {
208 return 0;
209 }
210}
211
212int fncmp(const void *a, const void *b) {
213 return strcoll(*((char* const*) a), *((char* const*) b));
214}
215
216void read_dir_rec(const char *dirname) {
217 char *filename;
218 const char **dirnames;
219 int dircnt, diridx;
220 int fcnt, fstart;
221 unsigned char first;
222 size_t len;
223 DIR *dir;
224 struct dirent *dentry;
225 struct stat fstats;
226
227 if (!dirname)
228 return;
229
230 dircnt = DNAME_CNT;
231 diridx = first = 1;
232 dirnames = (const char**) s_malloc(dircnt * sizeof(const char*));
233 dirnames[0] = dirname;
234
235 fcnt = 0;
236 fstart = fileidx;
237
238 while (diridx > 0) {
239 dirname = dirnames[--diridx];
240 if (!(dir = opendir(dirname))) {
241 warn("could not open directory: %s", dirname);
242 } else {
243 while ((dentry = readdir(dir))) {
244 if (!strcmp(dentry->d_name, ".") || !strcmp(dentry->d_name, ".."))
245 continue;
246
247 len = strlen(dirname) + strlen(dentry->d_name) + 2;
248 filename = (char*) s_malloc(len * sizeof(char));
249 snprintf(filename, len, "%s/%s", dirname, dentry->d_name);
250
251 if (!stat(filename, &fstats) && S_ISDIR(fstats.st_mode)) {
252 if (diridx == dircnt) {
253 dircnt *= 2;
254 dirnames = (const char**) s_realloc(dirnames,
255 dircnt * sizeof(const char*));
256 }
257 dirnames[diridx++] = filename;
258 } else {
259 if (check_append(filename))
260 ++fcnt;
261 else
262 free(filename);
263 }
264 }
265 closedir(dir);
266 }
267
268 if (!first)
269 free((void*) dirname);
270 else
271 first = 0;
272 }
273
274 if (fcnt > 1)
275 qsort(filenames + fstart, fcnt, sizeof(char*), fncmp);
276
277 free(dirnames);
278}
279
280#ifdef EXT_COMMANDS
281int run_command(const char *cline, Bool reload) {
282 int fncnt, fnlen;
283 char *cn, *cmdline;
284 const char *co, *fname;
285 pid_t pid;
286 int ret, status;
287
288 if (!cline || !*cline)
289 return 0;
290
291 fncnt = 0;
292 co = cline - 1;
293 while ((co = strchr(co + 1, '#')))
294 ++fncnt;
295
296 if (!fncnt)
297 return 0;
298
299 ret = 0;
300 fname = filenames[mode == MODE_NORMAL ? fileidx : tns.sel];
301 fnlen = strlen(fname);
302 cn = cmdline = (char*) s_malloc((strlen(cline) + fncnt * (fnlen + 2)) *
303 sizeof(char));
304
305 /* replace all '#' with filename */
306 for (co = cline; *co; ++co) {
307 if (*co == '#') {
308 *cn++ = '"';
309 strcpy(cn, fname);
310 cn += fnlen;
311 *cn++ = '"';
312 } else {
313 *cn++ = *co;
314 }
315 }
316 *cn = '\0';
317
318 if ((pid = fork()) == 0) {
319 execlp("/bin/sh", "/bin/sh", "-c", cmdline, NULL);
320 warn("could not exec: /bin/sh");
321 exit(1);
322 } else if (pid < 0) {
323 warn("could not fork. command line was: %s", cmdline);
324 } else if (reload) {
325 waitpid(pid, &status, 0);
326 if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
327 ret = 1;
328 else
329 warn("child exited with non-zero return value: %d. command line was: %s",
330 WEXITSTATUS(status), cmdline);
331 }
332
333 free(cmdline);
334 return ret;
335}
336#endif /* EXT_COMMANDS */
337
338
339/* event handling */
340
341#define TO_WIN_RESIZE 75000;
342#define TO_IMAGE_DRAG 1000;
343#define TO_CURSOR_HIDE 1500000;
344#define TO_THUMBS_LOAD 75000;
345int timo_cursor;
346int timo_redraw;
347
348unsigned char drag;
349int mox, moy;
350
351void redraw() {
352 if (mode == MODE_NORMAL)
353 img_render(&img, &win);
354 else
355 tns_render(&tns, &win);
356 update_title();
357 timo_redraw = 0;
358}
359
360void on_keypress(XKeyEvent *kev) {
361 int x, y;
362 unsigned int w, h;
363 char key;
364 KeySym ksym;
365 int changed;
366
367 if (!kev)
368 return;
369
370 XLookupString(kev, &key, 1, &ksym, NULL);
371 changed = 0;
372
373#ifdef EXT_COMMANDS
374 /* external commands from commands.h */
375 if (CLEANMASK(kev->state) & ControlMask) {
376 for (x = 0; x < LEN(commands); ++x) {
377 if (commands[x].ksym == ksym) {
378 win_set_cursor(&win, CURSOR_WATCH);
379 if (run_command(commands[x].cmdline, commands[x].reload)) {
380 if (mode == MODE_NORMAL) {
381 img_close(&img, 1);
382 load_image(fileidx);
383 tns_load(&tns, &win, fileidx, filenames[fileidx]);
384 } else {
385 tns_load(&tns, &win, tns.sel, filenames[tns.sel]);
386 }
387 redraw();
388 }
389 win_set_cursor(&win, mode == MODE_NORMAL ? CURSOR_NONE : CURSOR_ARROW);
390 return;
391 }
392 }
393 }
394#endif
395
396 if (mode == MODE_NORMAL) {
397 switch (ksym) {
398 /* navigate image list */
399 case XK_n:
400 case XK_space:
401 if (fileidx + 1 < filecnt)
402 changed = load_image(fileidx + 1);
403 break;
404 case XK_p:
405 case XK_BackSpace:
406 if (fileidx > 0)
407 changed = load_image(fileidx - 1);
408 break;
409 case XK_bracketleft:
410 if (fileidx != 0)
411 changed = load_image(MAX(0, fileidx - 10));
412 break;
413 case XK_bracketright:
414 if (fileidx != filecnt - 1)
415 changed = load_image(MIN(fileidx + 10, filecnt - 1));
416 break;
417 case XK_g:
418 if (fileidx != 0)
419 changed = load_image(0);
420 break;
421 case XK_G:
422 if (fileidx != filecnt - 1)
423 changed = load_image(filecnt - 1);
424 break;
425
426 /* zooming */
427 case XK_plus:
428 case XK_equal:
429 changed = img_zoom_in(&img);
430 break;
431 case XK_minus:
432 changed = img_zoom_out(&img);
433 break;
434 case XK_0:
435 changed = img_zoom(&img, 1.0);
436 break;
437 case XK_w:
438 if ((changed = img_fit_win(&img, &win)))
439 img_center(&img, &win);
440 break;
441
442 /* panning */
443 case XK_h:
444 case XK_Left:
445 changed = img_pan(&img, &win, PAN_LEFT);
446 break;
447 case XK_j:
448 case XK_Down:
449 changed = img_pan(&img, &win, PAN_DOWN);
450 break;
451 case XK_k:
452 case XK_Up:
453 changed = img_pan(&img, &win, PAN_UP);
454 break;
455 case XK_l:
456 case XK_Right:
457 changed = img_pan(&img, &win, PAN_RIGHT);
458 break;
459
460 /* rotation */
461 case XK_less:
462 img_rotate_left(&img, &win);
463 changed = 1;
464 break;
465 case XK_greater:
466 img_rotate_right(&img, &win);
467 changed = 1;
468 break;
469
470 /* control window */
471 case XK_W:
472 x = MAX(0, win.x + img.x);
473 y = MAX(0, win.y + img.y);
474 w = img.w * img.zoom;
475 h = img.h * img.zoom;
476 if ((changed = win_moveresize(&win, x, y, w, h))) {
477 img.x = x - win.x;
478 img.y = y - win.y;
479 }
480 break;
481
482 /* switch to thumbnail mode */
483 case XK_Return:
484 if (!tns.thumbs)
485 tns_init(&tns, filecnt);
486 img_close(&img, 0);
487 mode = MODE_THUMBS;
488 win_set_cursor(&win, CURSOR_ARROW);
489 timo_cursor = 0;
490 tns.sel = fileidx;
491 changed = tns.dirty = 1;
492 break;
493
494 /* miscellaneous */
495 case XK_a:
496 img_toggle_antialias(&img);
497 changed = 1;
498 break;
499 case XK_A:
500 img.alpha ^= 1;
501 changed = 1;
502 break;
503 case XK_r:
504 changed = load_image(fileidx);
505 break;
506 }
507 } else {
508 /* thumbnail mode */
509 switch (ksym) {
510 /* open selected image */
511 case XK_Return:
512 load_image(tns.sel);
513 mode = MODE_NORMAL;
514 win_set_cursor(&win, CURSOR_NONE);
515 changed = 1;
516 break;
517
518 /* move selection */
519 case XK_h:
520 case XK_Left:
521 changed = tns_move_selection(&tns, &win, TNS_LEFT);
522 break;
523 case XK_j:
524 case XK_Down:
525 changed = tns_move_selection(&tns, &win, TNS_DOWN);
526 break;
527 case XK_k:
528 case XK_Up:
529 changed = tns_move_selection(&tns, &win, TNS_UP);
530 break;
531 case XK_l:
532 case XK_Right:
533 changed = tns_move_selection(&tns, &win, TNS_RIGHT);
534 break;
535 case XK_g:
536 if (tns.sel != 0) {
537 tns.sel = 0;
538 changed = tns.dirty = 1;
539 }
540 break;
541 case XK_G:
542 if (tns.sel != tns.cnt - 1) {
543 tns.sel = tns.cnt - 1;
544 changed = tns.dirty = 1;
545 }
546 }
547 }
548
549 /* common key mappings */
550 switch (ksym) {
551 case XK_Escape:
552 cleanup();
553 exit(2);
554 case XK_q:
555 cleanup();
556 exit(0);
557
558 case XK_f:
559 win_toggle_fullscreen(&win);
560 /* render on next configurenotify */
561 break;
562 }
563
564 if (changed)
565 redraw();
566}
567
568void on_buttonpress(XButtonEvent *bev) {
569 int changed, sel;
570 unsigned int mask;
571
572 if (!bev)
573 return;
574
575 mask = CLEANMASK(bev->state);
576 changed = 0;
577
578 if (mode == MODE_NORMAL) {
579 switch (bev->button) {
580 case Button1:
581 if (fileidx + 1 < filecnt)
582 changed = load_image(fileidx + 1);
583 break;
584 case Button2:
585 mox = bev->x;
586 moy = bev->y;
587 win_set_cursor(&win, CURSOR_HAND);
588 timo_cursor = 0;
589 drag = 1;
590 break;
591 case Button3:
592 if (fileidx > 0)
593 changed = load_image(fileidx - 1);
594 break;
595 case Button4:
596 if (mask == ControlMask)
597 changed = img_zoom_in(&img);
598 else if (mask == ShiftMask)
599 changed = img_pan(&img, &win, PAN_LEFT);
600 else
601 changed = img_pan(&img, &win, PAN_UP);
602 break;
603 case Button5:
604 if (mask == ControlMask)
605 changed = img_zoom_out(&img);
606 else if (mask == ShiftMask)
607 changed = img_pan(&img, &win, PAN_RIGHT);
608 else
609 changed = img_pan(&img, &win, PAN_DOWN);
610 break;
611 case 6:
612 changed = img_pan(&img, &win, PAN_LEFT);
613 break;
614 case 7:
615 changed = img_pan(&img, &win, PAN_RIGHT);
616 break;
617 }
618 } else {
619 /* thumbnail mode */
620 switch (bev->button) {
621 case Button1:
622 if ((sel = tns_translate(&tns, bev->x, bev->y)) >= 0) {
623 if (sel == tns.sel) {
624 load_image(tns.sel);
625 mode = MODE_NORMAL;
626 timo_cursor = TO_CURSOR_HIDE;
627 } else {
628 tns_highlight(&tns, &win, tns.sel, False);
629 tns_highlight(&tns, &win, sel, True);
630 tns.sel = sel;
631 }
632 changed = 1;
633 break;
634 }
635 break;
636 case Button4:
637 changed = tns_scroll(&tns, TNS_UP);
638 break;
639 case Button5:
640 changed = tns_scroll(&tns, TNS_DOWN);
641 break;
642 }
643 }
644
645 if (changed)
646 redraw();
647}
648
649void on_motionnotify(XMotionEvent *mev) {
650 if (!mev)
651 return;
652
653 if (mev->x >= 0 && mev->x <= win.w && mev->y >= 0 && mev->y <= win.h) {
654 if (img_move(&img, &win, mev->x - mox, mev->y - moy))
655 timo_redraw = TO_IMAGE_DRAG;
656
657 mox = mev->x;
658 moy = mev->y;
659 }
660}
661
662void run() {
663 int xfd, timeout;
664 fd_set fds;
665 struct timeval tt, t0, t1;
666 XEvent ev;
667
668 timo_cursor = timo_redraw = 0;
669 drag = 0;
670
671 if (mode == MODE_NORMAL)
672 timo_cursor = TO_CURSOR_HIDE;
673
674 while (1) {
675 if (mode == MODE_THUMBS && tns.cnt < filecnt) {
676 win_set_cursor(&win, CURSOR_WATCH);
677 gettimeofday(&t0, 0);
678
679 while (!XPending(win.env.dpy) && tns.cnt < filecnt) {
680 /* tns.cnt is increased inside tns_load */
681 tns_load(&tns, &win, tns.cnt, filenames[tns.cnt]);
682 gettimeofday(&t1, 0);
683 if (TV_TO_DOUBLE(t1) - TV_TO_DOUBLE(t0) >= 0.25)
684 break;
685 }
686 if (tns.cnt == filecnt)
687 win_set_cursor(&win, CURSOR_ARROW);
688 if (!XPending(win.env.dpy)) {
689 redraw();
690 continue;
691 } else {
692 timo_redraw = TO_THUMBS_LOAD;
693 }
694 } else if (timo_cursor || timo_redraw) {
695 gettimeofday(&t0, 0);
696 if (timo_cursor && timo_redraw)
697 timeout = MIN(timo_cursor, timo_redraw);
698 else if (timo_cursor)
699 timeout = timo_cursor;
700 else
701 timeout = timo_redraw;
702 tt.tv_sec = timeout / 1000000;
703 tt.tv_usec = timeout % 1000000;
704 xfd = ConnectionNumber(win.env.dpy);
705 FD_ZERO(&fds);
706 FD_SET(xfd, &fds);
707
708 if (!XPending(win.env.dpy))
709 select(xfd + 1, &fds, 0, 0, &tt);
710 gettimeofday(&t1, 0);
711 timeout = MIN((TV_TO_DOUBLE(t1) - TV_TO_DOUBLE(t0)) * 1000000, timeout);
712
713 /* timeouts fired? */
714 if (timo_cursor) {
715 timo_cursor = MAX(0, timo_cursor - timeout);
716 if (!timo_cursor)
717 win_set_cursor(&win, CURSOR_NONE);
718 }
719 if (timo_redraw) {
720 timo_redraw = MAX(0, timo_redraw - timeout);
721 if (!timo_redraw)
722 redraw();
723 }
724 if (!XPending(win.env.dpy) && (timo_cursor || timo_redraw))
725 continue;
726 }
727
728 if (!XNextEvent(win.env.dpy, &ev)) {
729 switch (ev.type) {
730 case KeyPress:
731 on_keypress(&ev.xkey);
732 break;
733 case ButtonPress:
734 on_buttonpress(&ev.xbutton);
735 break;
736 case ButtonRelease:
737 if (ev.xbutton.button == Button2) {
738 drag = 0;
739 if (mode == MODE_NORMAL) {
740 win_set_cursor(&win, CURSOR_ARROW);
741 timo_cursor = TO_CURSOR_HIDE;
742 }
743 }
744 break;
745 case MotionNotify:
746 if (drag) {
747 on_motionnotify(&ev.xmotion);
748 } else if (mode == MODE_NORMAL) {
749 if (!timo_cursor)
750 win_set_cursor(&win, CURSOR_ARROW);
751 timo_cursor = TO_CURSOR_HIDE;
752 }
753 break;
754 case ConfigureNotify:
755 if (win_configure(&win, &ev.xconfigure)) {
756 timo_redraw = TO_WIN_RESIZE;
757 if (mode == MODE_NORMAL)
758 img.checkpan = 1;
759 else
760 tns.dirty = 1;
761 }
762 break;
763 case ClientMessage:
764 if ((Atom) ev.xclient.data.l[0] == wm_delete_win)
765 return;
766 break;
767 }
768 }
769 }
770}