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