sistema_progs

main.c (21154B)

---

 /* Copyright 2011-2013 Bert Muennich
  *
  * This file is part of sxiv.
  *
  * sxiv is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published
  * by the Free Software Foundation; either version 2 of the License,
  * or (at your option) any later version.
  *
  * sxiv is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with sxiv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "sxiv.h"
 #define _MAPPINGS_CONFIG
 #include "config.h"
 
 #include <stdlib.h>
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
 #include <locale.h>
 #include <signal.h>
 #include <sys/select.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <time.h>
 #include <X11/keysym.h>
 #include <X11/XF86keysym.h>
 
 typedef struct {
 	struct timeval when;
 	bool active;
 	timeout_f handler;
 } timeout_t;
 
 /* timeout handler functions: */
 void redraw(void);
 void reset_cursor(void);
 void animate(void);
 void slideshow(void);
 void clear_resize(void);
 
 appmode_t mode;
 arl_t arl;
 img_t img;
 tns_t tns;
 win_t win;
 
 fileinfo_t *files;
 int filecnt, fileidx;
 int alternate;
 int markcnt;
 int markidx;
 
 int prefix;
 bool extprefix;
 
 bool resized = false;
 
 typedef struct {
 	int err;
 	char *cmd;
 } extcmd_t;
 
 struct {
 	extcmd_t f;
 	int fd;
 	unsigned int i, lastsep;
 	pid_t pid;
 } info;
 
 struct {
 	extcmd_t f;
 	bool warned;
 } keyhandler;
 
 timeout_t timeouts[] = {
 	{ { 0, 0 }, false, redraw       },
 	{ { 0, 0 }, false, reset_cursor },
 	{ { 0, 0 }, false, animate      },
 	{ { 0, 0 }, false, slideshow    },
 	{ { 0, 0 }, false, clear_resize },
 };
 
 cursor_t imgcursor[3] = {
 	CURSOR_ARROW, CURSOR_ARROW, CURSOR_ARROW
 };
 
 void cleanup(void)
 {
 	img_close(&img, false);
 	arl_cleanup(&arl);
 	tns_free(&tns);
 	win_close(&win);
 }
 
 void check_add_file(char *filename, bool given)
 {
 	char *path;
 
 	if (*filename == '\0')
 		return;
 
 	if (access(filename, R_OK) < 0 ||
 	    (path = realpath(filename, NULL)) == NULL)
 	{
 		if (given)
 			error(0, errno, "%s", filename);
 		return;
 	}
 
 	if (fileidx == filecnt) {
 		filecnt *= 2;
 		files = erealloc(files, filecnt * sizeof(*files));
 		memset(&files[filecnt/2], 0, filecnt/2 * sizeof(*files));
 	}
 
 	files[fileidx].name = estrdup(filename);
 	files[fileidx].path = path;
 	if (given)
 		files[fileidx].flags |= FF_WARN;
 	fileidx++;
 }
 
 void remove_file(int n, bool manual)
 {
 	if (n < 0 || n >= filecnt)
 		return;
 
 	if (filecnt == 1) {
 		if (!manual)
 			fprintf(stderr, "sxiv: no more files to display, aborting\n");
 		exit(manual ? EXIT_SUCCESS : EXIT_FAILURE);
 	}
 	if (files[n].flags & FF_MARK)
 		markcnt--;
 
 	if (files[n].path != files[n].name)
 		free((void*) files[n].path);
 	free((void*) files[n].name);
 
 	if (n + 1 < filecnt) {
 		if (tns.thumbs != NULL) {
 			memmove(tns.thumbs + n, tns.thumbs + n + 1, (filecnt - n - 1) *
 			        sizeof(*tns.thumbs));
 			memset(tns.thumbs + filecnt - 1, 0, sizeof(*tns.thumbs));
 		}
 		memmove(files + n, files + n + 1, (filecnt - n - 1) * sizeof(*files));
 	}
 	filecnt--;
 	if (fileidx > n || fileidx == filecnt)
 		fileidx--;
 	if (alternate > n || alternate == filecnt)
 		alternate--;
 	if (markidx > n || markidx == filecnt)
 		markidx--;
 }
 
 void set_timeout(timeout_f handler, int time, bool overwrite)
 {
 	int i;
 
 	for (i = 0; i < ARRLEN(timeouts); i++) {
 		if (timeouts[i].handler == handler) {
 			if (!timeouts[i].active || overwrite) {
 				gettimeofday(&timeouts[i].when, 0);
 				TV_ADD_MSEC(&timeouts[i].when, time);
 				timeouts[i].active = true;
 			}
 			return;
 		}
 	}
 }
 
 void reset_timeout(timeout_f handler)
 {
 	int i;
 
 	for (i = 0; i < ARRLEN(timeouts); i++) {
 		if (timeouts[i].handler == handler) {
 			timeouts[i].active = false;
 			return;
 		}
 	}
 }
 
 bool check_timeouts(struct timeval *t)
 {
 	int i = 0, tdiff, tmin = -1;
 	struct timeval now;
 
 	while (i < ARRLEN(timeouts)) {
 		if (timeouts[i].active) {
 			gettimeofday(&now, 0);
 			tdiff = TV_DIFF(&timeouts[i].when, &now);
 			if (tdiff <= 0) {
 				timeouts[i].active = false;
 				if (timeouts[i].handler != NULL)
 					timeouts[i].handler();
 				i = tmin = -1;
 			} else if (tmin < 0 || tdiff < tmin) {
 				tmin = tdiff;
 			}
 		}
 		i++;
 	}
 	if (tmin > 0 && t != NULL)
 		TV_SET_MSEC(t, tmin);
 	return tmin > 0;
 }
 
 void close_info(void)
 {
 	if (info.fd != -1) {
 		kill(info.pid, SIGTERM);
 		close(info.fd);
 		info.fd = -1;
 	}
 }
 
 void open_info(void)
 {
 	int pfd[2];
 	char w[12], h[12];
 
 	if (info.f.err != 0 || info.fd >= 0 || win.bar.h == 0)
 		return;
 	win.bar.l.buf[0] = '\0';
 	if (pipe(pfd) < 0)
 		return;
 	if ((info.pid = fork()) == 0) {
 		close(pfd[0]);
 		dup2(pfd[1], 1);
 		snprintf(w, sizeof(w), "%d", img.w);
 		snprintf(h, sizeof(h), "%d", img.h);
 		execl(info.f.cmd, info.f.cmd, files[fileidx].name, w, h, NULL);
 		error(EXIT_FAILURE, errno, "exec: %s", info.f.cmd);
 	}
 	close(pfd[1]);
 	if (info.pid < 0) {
 		close(pfd[0]);
 	} else {
 		fcntl(pfd[0], F_SETFL, O_NONBLOCK);
 		info.fd = pfd[0];
 		info.i = info.lastsep = 0;
 	}
 }
 
 void read_info(void)
 {
 	ssize_t i, n;
 	char buf[BAR_L_LEN];
 
 	while (true) {
 		n = read(info.fd, buf, sizeof(buf));
 		if (n < 0 && errno == EAGAIN)
 			return;
 		else if (n == 0)
 			goto end;
 		for (i = 0; i < n; i++) {
 			if (buf[i] == '\n') {
 				if (info.lastsep == 0) {
 					win.bar.l.buf[info.i++] = ' ';
 					info.lastsep = 1;
 				}
 			} else {
 				win.bar.l.buf[info.i++] = buf[i];
 				info.lastsep = 0;
 			}
 			if (info.i + 1 == win.bar.l.size)
 				goto end;
 		}
 	}
 end:
 	info.i -= info.lastsep;
 	win.bar.l.buf[info.i] = '\0';
 	win_draw(&win);
 	close_info();
 }
 
 void load_image(int new)
 {
 	bool prev = new < fileidx;
 	static int current;
 
 	if (new < 0 || new >= filecnt)
 		return;
 
 	if (win.xwin != None)
 		win_set_cursor(&win, CURSOR_WATCH);
 	reset_timeout(slideshow);
 
 	if (new != current)
 		alternate = current;
 
 	img_close(&img, false);
 	while (!img_load(&img, &files[new])) {
 		remove_file(new, false);
 		if (new >= filecnt)
 			new = filecnt - 1;
 		else if (new > 0 && prev)
 			new--;
 	}
 	files[new].flags &= ~FF_WARN;
 	fileidx = current = new;
 
 	close_info();
 	open_info();
 	arl_setup(&arl, files[fileidx].path);
 
 	if (img.multi.cnt > 0 && img.multi.animate)
 		set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
 	else
 		reset_timeout(animate);
 }
 
 bool mark_image(int n, bool on)
 {
 	markidx = n;
 	if (!!(files[n].flags & FF_MARK) != on) {
 		files[n].flags ^= FF_MARK;
 		markcnt += on ? 1 : -1;
 		if (mode == MODE_THUMB)
 			tns_mark(&tns, n, on);
 		return true;
 	}
 	return false;
 }
 
 void bar_put(win_bar_t *bar, const char *fmt, ...)
 {
 	size_t len = bar->size - (bar->p - bar->buf), n;
 	va_list ap;
 
 	va_start(ap, fmt);
 	n = vsnprintf(bar->p, len, fmt, ap);
 	bar->p += MIN(len, n);
 	va_end(ap);
 }
 
 #define BAR_SEP "  "
 
 void update_info(void)
 {
 	unsigned int i, fn, fw;
 	const char * mark;
 	win_bar_t *l = &win.bar.l, *r = &win.bar.r;
 
 	/* update bar contents */
 	if (win.bar.h == 0)
 		return;
 	for (fw = 0, i = filecnt; i > 0; fw++, i /= 10);
 	mark = files[fileidx].flags & FF_MARK ? "* " : "";
 	l->p = l->buf;
 	r->p = r->buf;
 	if (mode == MODE_THUMB) {
 		if (tns.loadnext < tns.end)
 			bar_put(l, "Loading... %0*d", fw, tns.loadnext + 1);
 		else if (tns.initnext < filecnt)
 			bar_put(l, "Caching... %0*d", fw, tns.initnext + 1);
 		else
 			strncpy(l->buf, files[fileidx].name, l->size);
 		bar_put(r, "%s%0*d/%d", mark, fw, fileidx + 1, filecnt);
 	} else {
 		bar_put(r, "%s", mark);
 		if (img.ss.on) {
 			if (img.ss.delay % 10 != 0)
 				bar_put(r, "%2.1fs" BAR_SEP, (float)img.ss.delay / 10);
 			else
 				bar_put(r, "%ds" BAR_SEP, img.ss.delay / 10);
 		}
 		if (img.gamma != 0)
 			bar_put(r, "G%+d" BAR_SEP, img.gamma);
 		bar_put(r, "%3d%%" BAR_SEP, (int) (img.zoom * 100.0));
 		if (img.multi.cnt > 0) {
 			for (fn = 0, i = img.multi.cnt; i > 0; fn++, i /= 10);
 			bar_put(r, "%0*d/%d" BAR_SEP, fn, img.multi.sel + 1, img.multi.cnt);
 		}
 		bar_put(r, "%0*d/%d", fw, fileidx + 1, filecnt);
 		if (info.f.err)
 			strncpy(l->buf, files[fileidx].name, l->size);
 	}
 }
 
 int ptr_third_x(void)
 {
 	int x, y;
 
 	win_cursor_pos(&win, &x, &y);
 	return MAX(0, MIN(2, (x / (win.w * 0.33))));
 }
 
 void redraw(void)
 {
 	int t;
 
 	if (mode == MODE_IMAGE) {
 		img_render(&img);
 		if (img.ss.on) {
 			t = img.ss.delay * 100;
 			if (img.multi.cnt > 0 && img.multi.animate)
 				t = MAX(t, img.multi.length);
 			set_timeout(slideshow, t, false);
 		}
 	} else {
 		tns_render(&tns);
 	}
 	update_info();
 	win_draw(&win);
 	reset_timeout(redraw);
 	reset_cursor();
 }
 
 void reset_cursor(void)
 {
 	int c, i;
 	cursor_t cursor = CURSOR_NONE;
 
 	if (mode == MODE_IMAGE) {
 		for (i = 0; i < ARRLEN(timeouts); i++) {
 			if (timeouts[i].handler == reset_cursor) {
 				if (timeouts[i].active) {
 					c = ptr_third_x();
 					c = MAX(fileidx > 0 ? 0 : 1, c);
 					c = MIN(fileidx + 1 < filecnt ? 2 : 1, c);
 					cursor = imgcursor[c];
 				}
 				break;
 			}
 		}
 	} else {
 		if (tns.loadnext < tns.end || tns.initnext < filecnt)
 			cursor = CURSOR_WATCH;
 		else
 			cursor = CURSOR_ARROW;
 	}
 	win_set_cursor(&win, cursor);
 }
 
 void animate(void)
 {
 	if (img_frame_animate(&img)) {
 		redraw();
 		set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
 	}
 }
 
 void slideshow(void)
 {
 	load_image(fileidx + 1 < filecnt ? fileidx + 1 : 0);
 	redraw();
 }
 
 void clear_resize(void)
 {
 	resized = false;
 }
 
 Bool is_input_ev(Display *dpy, XEvent *ev, XPointer arg)
 {
 	return ev->type == ButtonPress || ev->type == KeyPress;
 }
 
 void run_key_handler(const char *key, unsigned int mask)
 {
 	pid_t pid;
 	FILE *pfs;
 	bool marked = mode == MODE_THUMB && markcnt > 0;
 	bool changed = false;
 	int f, i, pfd[2];
 	int fcnt = marked ? markcnt : 1;
 	char kstr[32];
 	struct stat *oldst, st;
 	XEvent dump;
 
 	if (keyhandler.f.err != 0) {
 		if (!keyhandler.warned) {
 			error(0, keyhandler.f.err, "%s", keyhandler.f.cmd);
 			keyhandler.warned = true;
 		}
 		return;
 	}
 	if (key == NULL)
 		return;
 
 	if (pipe(pfd) < 0) {
 		error(0, errno, "pipe");
 		return;
 	}
 	if ((pfs = fdopen(pfd[1], "w")) == NULL) {
 		error(0, errno, "open pipe");
 		close(pfd[0]), close(pfd[1]);
 		return;
 	}
 	oldst = emalloc(fcnt * sizeof(*oldst));
 
 	close_info();
 	strncpy(win.bar.l.buf, "Running key handler...", win.bar.l.size);
 	win_draw(&win);
 	win_set_cursor(&win, CURSOR_WATCH);
 
 	snprintf(kstr, sizeof(kstr), "%s%s%s%s",
 	         mask & ControlMask ? "C-" : "",
 	         mask & Mod1Mask    ? "M-" : "",
 	         mask & ShiftMask   ? "S-" : "", key);
 
 	if ((pid = fork()) == 0) {
 		close(pfd[1]);
 		dup2(pfd[0], 0);
 		execl(keyhandler.f.cmd, keyhandler.f.cmd, kstr, NULL);
 		error(EXIT_FAILURE, errno, "exec: %s", keyhandler.f.cmd);
 	}
 	close(pfd[0]);
 	if (pid < 0) {
 		error(0, errno, "fork");
 		fclose(pfs);
 		goto end;
 	}
 
 	for (f = i = 0; f < fcnt; i++) {
 		if ((marked && (files[i].flags & FF_MARK)) || (!marked && i == fileidx)) {
 			stat(files[i].path, &oldst[f]);
 			fprintf(pfs, "%s\n", files[i].name);
 			f++;
 		}
 	}
 	fclose(pfs);
 	while (waitpid(pid, NULL, 0) == -1 && errno == EINTR);
 
 	for (f = i = 0; f < fcnt; i++) {
 		if ((marked && (files[i].flags & FF_MARK)) || (!marked && i == fileidx)) {
 			if (stat(files[i].path, &st) != 0 ||
 				  memcmp(&oldst[f].st_mtime, &st.st_mtime, sizeof(st.st_mtime)) != 0)
 			{
 				if (tns.thumbs != NULL) {
 					tns_unload(&tns, i);
 					tns.loadnext = MIN(tns.loadnext, i);
 				}
 				changed = true;
 			}
 			f++;
 		}
 	}
 	/* drop user input events that occurred while running the key handler */
 	while (XCheckIfEvent(win.env.dpy, &dump, is_input_ev, NULL));
 
 end:
 	if (mode == MODE_IMAGE) {
 		if (changed) {
 			img_close(&img, true);
 			load_image(fileidx);
 		} else {
 			open_info();
 		}
 	}
 	free(oldst);
 	reset_cursor();
 	redraw();
 }
 
 #define MODMASK(mask) ((mask) & (ShiftMask|ControlMask|Mod1Mask))
 
 void on_keypress(XKeyEvent *kev)
 {
 	int i;
 	unsigned int sh = 0;
 	KeySym ksym, shksym;
 	char dummy, key;
 	bool dirty = false;
 
 	XLookupString(kev, &key, 1, &ksym, NULL);
 
 	if (kev->state & ShiftMask) {
 		kev->state &= ~ShiftMask;
 		XLookupString(kev, &dummy, 1, &shksym, NULL);
 		kev->state |= ShiftMask;
 		if (ksym != shksym)
 			sh = ShiftMask;
 	}
 	if (IsModifierKey(ksym))
 		return;
 	if (ksym == XK_Escape && MODMASK(kev->state) == 0) {
 		extprefix = False;
 	} else if (extprefix) {
 		run_key_handler(XKeysymToString(ksym), kev->state & ~sh);
 		extprefix = False;
 	} else if (key >= '0' && key <= '9') {
 		/* number prefix for commands */
 		prefix = prefix * 10 + (int) (key - '0');
 		return;
 	} else for (i = 0; i < ARRLEN(keys); i++) {
 		if (keys[i].ksym == ksym &&
 		    MODMASK(keys[i].mask | sh) == MODMASK(kev->state) &&
 		    keys[i].cmd >= 0 && keys[i].cmd < CMD_COUNT &&
 		    (cmds[keys[i].cmd].mode < 0 || cmds[keys[i].cmd].mode == mode))
 		{
 			if (cmds[keys[i].cmd].func(keys[i].arg))
 				dirty = true;
 		}
 	}
 	if (dirty)
 		redraw();
 	prefix = 0;
 }
 
 void on_buttonpress(XButtonEvent *bev)
 {
 	int i, sel;
 	bool dirty = false;
 	static Time firstclick;
 
 	if (mode == MODE_IMAGE) {
 		set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 		reset_cursor();
 
 		for (i = 0; i < ARRLEN(buttons); i++) {
 			if (buttons[i].button == bev->button &&
 			    MODMASK(buttons[i].mask) == MODMASK(bev->state) &&
 			    buttons[i].cmd >= 0 && buttons[i].cmd < CMD_COUNT &&
 			    (cmds[buttons[i].cmd].mode < 0 || cmds[buttons[i].cmd].mode == mode))
 			{
 				if (cmds[buttons[i].cmd].func(buttons[i].arg))
 					dirty = true;
 			}
 		}
 		if (dirty)
 			redraw();
 	} else {
 		/* thumbnail mode (hard-coded) */
 		switch (bev->button) {
 			case Button1:
 				if ((sel = tns_translate(&tns, bev->x, bev->y)) >= 0) {
 					if (sel != fileidx) {
 						tns_highlight(&tns, fileidx, false);
 						tns_highlight(&tns, sel, true);
 						fileidx = sel;
 						firstclick = bev->time;
 						redraw();
 					} else if (bev->time - firstclick <= TO_DOUBLE_CLICK) {
 						mode = MODE_IMAGE;
 						set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 						load_image(fileidx);
 						redraw();
 					} else {
 						firstclick = bev->time;
 					}
 				}
 				break;
 			case Button3:
 				if ((sel = tns_translate(&tns, bev->x, bev->y)) >= 0) {
 					bool on = !(files[sel].flags & FF_MARK);
 					XEvent e;
 
 					for (;;) {
 						if (sel >= 0 && mark_image(sel, on))
 							redraw();
 						XMaskEvent(win.env.dpy,
 						           ButtonPressMask | ButtonReleaseMask | PointerMotionMask, &e);
 						if (e.type == ButtonPress || e.type == ButtonRelease)
 							break;
 						while (XCheckTypedEvent(win.env.dpy, MotionNotify, &e));
 						sel = tns_translate(&tns, e.xbutton.x, e.xbutton.y);
 					}
 				}
 				break;
 			case Button4:
 			case Button5:
 				if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN,
 				               (bev->state & ControlMask) != 0))
 					redraw();
 				break;
 		}
 	}
 	prefix = 0;
 }
 
 const struct timespec ten_ms = {0, 10000000};
 
 void run(void)
 {
 	int xfd;
 	fd_set fds;
 	struct timeval timeout;
 	bool discard, init_thumb, load_thumb, to_set;
 	XEvent ev, nextev;
 
 	while (true) {
 		to_set = check_timeouts(&timeout);
 		init_thumb = mode == MODE_THUMB && tns.initnext < filecnt;
 		load_thumb = mode == MODE_THUMB && tns.loadnext < tns.end;
 
 		if ((init_thumb || load_thumb || to_set || info.fd != -1 ||
 			   arl.fd != -1) && XPending(win.env.dpy) == 0)
 		{
 			if (load_thumb) {
 				set_timeout(redraw, TO_REDRAW_THUMBS, false);
 				if (!tns_load(&tns, tns.loadnext, false, false)) {
 					remove_file(tns.loadnext, false);
 					tns.dirty = true;
 				}
 				if (tns.loadnext >= tns.end)
 					redraw();
 			} else if (init_thumb) {
 				set_timeout(redraw, TO_REDRAW_THUMBS, false);
 				if (!tns_load(&tns, tns.initnext, false, true))
 					remove_file(tns.initnext, false);
 			} else {
 				xfd = ConnectionNumber(win.env.dpy);
 				FD_ZERO(&fds);
 				FD_SET(xfd, &fds);
 				if (info.fd != -1) {
 					FD_SET(info.fd, &fds);
 					xfd = MAX(xfd, info.fd);
 				}
 				if (arl.fd != -1) {
 					FD_SET(arl.fd, &fds);
 					xfd = MAX(xfd, arl.fd);
 				}
 				select(xfd + 1, &fds, 0, 0, to_set ? &timeout : NULL);
 				if (info.fd != -1 && FD_ISSET(info.fd, &fds))
 					read_info();
 				if (arl.fd != -1 && FD_ISSET(arl.fd, &fds)) {
 					if (arl_handle(&arl)) {
 						/* when too fast, imlib2 can't load the image */
 						nanosleep(&ten_ms, NULL);
 						img_close(&img, true);
 						load_image(fileidx);
 						redraw();
 					}
 				}
 			}
 			continue;
 		}
 
 		do {
 			XNextEvent(win.env.dpy, &ev);
 			discard = false;
 			if (XEventsQueued(win.env.dpy, QueuedAlready) > 0) {
 				XPeekEvent(win.env.dpy, &nextev);
 				switch (ev.type) {
 					case ConfigureNotify:
 					case MotionNotify:
 						discard = ev.type == nextev.type;
 						break;
 					case KeyPress:
 						discard = (nextev.type == KeyPress || nextev.type == KeyRelease)
 						          && ev.xkey.keycode == nextev.xkey.keycode;
 						break;
 				}
 			}
 		} while (discard);
 
 		switch (ev.type) {
 			/* handle events */
 			case ButtonPress:
 				on_buttonpress(&ev.xbutton);
 				break;
 			case ClientMessage:
 				if ((Atom) ev.xclient.data.l[0] == atoms[ATOM_WM_DELETE_WINDOW])
 					cmds[g_quit].func(0);
 				break;
 			case ConfigureNotify:
 				if (win_configure(&win, &ev.xconfigure)) {
 					if (mode == MODE_IMAGE) {
 						img.dirty = true;
 						img.checkpan = true;
 					} else {
 						tns.dirty = true;
 					}
 					if (!resized) {
 						redraw();
 						set_timeout(clear_resize, TO_REDRAW_RESIZE, false);
 						resized = true;
 					} else {
 						set_timeout(redraw, TO_REDRAW_RESIZE, false);
 					}
 				}
 				break;
 			case KeyPress:
 				on_keypress(&ev.xkey);
 				break;
 			case MotionNotify:
 				if (mode == MODE_IMAGE) {
 					set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
 					reset_cursor();
 				}
 				break;
 		}
 	}
 }
 
 int fncmp(const void *a, const void *b)
 {
 	return strcoll(((fileinfo_t*) a)->name, ((fileinfo_t*) b)->name);
 }
 
 void sigchld(int sig)
 {
 	while (waitpid(-1, NULL, WNOHANG) > 0);
 }
 
 void setup_signal(int sig, void (*handler)(int sig))
 {
 	struct sigaction sa;
 
 	sa.sa_handler = handler;
 	sigemptyset(&sa.sa_mask);
 	sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
 	if (sigaction(sig, &sa, 0) == -1)
 		error(EXIT_FAILURE, errno, "signal %d", sig);
 }
 
 int main(int argc, char **argv)
 {
 	int i, start;
 	size_t n;
 	ssize_t len;
 	char *filename;
 	const char *homedir, *dsuffix = "";
 	struct stat fstats;
 	r_dir_t dir;
 
 	setup_signal(SIGCHLD, sigchld);
 	setup_signal(SIGPIPE, SIG_IGN);
 
 	setlocale(LC_COLLATE, "");
 
 	parse_options(argc, argv);
 
 	if (options->clean_cache) {
 		tns_init(&tns, NULL, NULL, NULL, NULL);
 		tns_clean_cache(&tns);
 		exit(EXIT_SUCCESS);
 	}
 
 	if (options->filecnt == 0 && !options->from_stdin) {
 		print_usage();
 		exit(EXIT_FAILURE);
 	}
 
 	if (options->recursive || options->from_stdin)
 		filecnt = 1024;
 	else
 		filecnt = options->filecnt;
 
 	files = emalloc(filecnt * sizeof(*files));
 	memset(files, 0, filecnt * sizeof(*files));
 	fileidx = 0;
 
 	if (options->from_stdin) {
 		n = 0;
 		filename = NULL;
 		while ((len = getline(&filename, &n, stdin)) > 0) {
 			if (filename[len-1] == '\n')
 				filename[len-1] = '\0';
 			check_add_file(filename, true);
 		}
 		free(filename);
 	}
 
 	for (i = 0; i < options->filecnt; i++) {
 		filename = options->filenames[i];
 
 		if (stat(filename, &fstats) < 0) {
 			error(0, errno, "%s", filename);
 			continue;
 		}
 		if (!S_ISDIR(fstats.st_mode)) {
 			check_add_file(filename, true);
 		} else {
 			if (r_opendir(&dir, filename, options->recursive) < 0) {
 				error(0, errno, "%s", filename);
 				continue;
 			}
 			start = fileidx;
 			while ((filename = r_readdir(&dir, true)) != NULL) {
 				check_add_file(filename, false);
 				free((void*) filename);
 			}
 			r_closedir(&dir);
 			if (fileidx - start > 1)
 				qsort(files + start, fileidx - start, sizeof(fileinfo_t), fncmp);
 		}
 	}
 
 	if (fileidx == 0)
 		error(EXIT_FAILURE, 0, "No valid image file given, aborting");
 
 	filecnt = fileidx;
 	fileidx = options->startnum < filecnt ? options->startnum : 0;
 
 	for (i = 0; i < ARRLEN(buttons); i++) {
 		if (buttons[i].cmd == i_cursor_navigate) {
 			imgcursor[0] = CURSOR_LEFT;
 			imgcursor[2] = CURSOR_RIGHT;
 			break;
 		}
 	}
 
 	win_init(&win);
 	img_init(&img, &win);
 	arl_init(&arl);
 
 	if ((homedir = getenv("XDG_CONFIG_HOME")) == NULL || homedir[0] == '\0') {
 		homedir = getenv("HOME");
 		dsuffix = "/.config";
 	}
 	if (homedir != NULL) {
 		extcmd_t *cmd[] = { &info.f, &keyhandler.f };
 		const char *name[] = { "image-info", "key-handler" };
 
 		for (i = 0; i < ARRLEN(cmd); i++) {
 			n = strlen(homedir) + strlen(dsuffix) + strlen(name[i]) + 12;
 			cmd[i]->cmd = (char*) emalloc(n);
 			snprintf(cmd[i]->cmd, n, "%s%s/sxiv/exec/%s", homedir, dsuffix, name[i]);
 			if (access(cmd[i]->cmd, X_OK) != 0)
 				cmd[i]->err = errno;
 		}
 	} else {
 		error(0, 0, "Exec directory not found");
 	}
 	info.fd = -1;
 
 	if (options->thumb_mode) {
 		mode = MODE_THUMB;
 		tns_init(&tns, files, &filecnt, &fileidx, &win);
 		while (!tns_load(&tns, fileidx, false, false))
 			remove_file(fileidx, false);
 	} else {
 		mode = MODE_IMAGE;
 		tns.thumbs = NULL;
 		load_image(fileidx);
 	}
 	win_open(&win);
 	win_set_cursor(&win, CURSOR_WATCH);
 
 	atexit(cleanup);
 
 	set_timeout(redraw, 25, false);
 
 	run();
 
 	return 0;
 }