nsxiv/main.c

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2013-02-08 20:52:41 +00:00
/* Copyright 2011-2013 Bert Muennich
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*
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* This file is part of sxiv.
*
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* 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.
*
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* 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/>.
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*/
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#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <X11/keysym.h>
#include <X11/XF86keysym.h>
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#include "types.h"
#include "commands.h"
#include "image.h"
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#include "options.h"
#include "thumbs.h"
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#include "util.h"
#include "window.h"
#define _MAPPINGS_CONFIG
#include "config.h"
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typedef struct {
struct timeval when;
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bool active;
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timeout_f handler;
} timeout_t;
/* timeout handler functions: */
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void redraw(void);
void reset_cursor(void);
void animate(void);
void slideshow(void);
void clear_resize(void);
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appmode_t mode;
img_t img;
tns_t tns;
win_t win;
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fileinfo_t *files;
int filecnt, fileidx;
int alternate;
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int markcnt;
int prefix;
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bool extprefix;
bool resized = false;
typedef struct {
int err;
char *cmd;
} extcmd_t;
struct {
extcmd_t f;
int fd;
unsigned int i, lastsep;
bool open;
} info;
struct {
extcmd_t f;
bool warned;
} keyhandler;
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timeout_t timeouts[] = {
{ { 0, 0 }, false, redraw },
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{ { 0, 0 }, false, reset_cursor },
{ { 0, 0 }, false, animate },
{ { 0, 0 }, false, slideshow },
{ { 0, 0 }, false, clear_resize },
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};
void cleanup(void)
{
img_close(&img, false);
tns_free(&tns);
win_close(&win);
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}
void check_add_file(char *filename, bool given)
{
char *path;
const char *bn;
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if (*filename == '\0')
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return;
if (access(filename, R_OK) < 0 ||
(path = realpath(filename, NULL)) == NULL)
{
if (given)
error(0, errno, "%s", filename);
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return;
}
if (fileidx == filecnt) {
filecnt *= 2;
files = erealloc(files, filecnt * sizeof(*files));
memset(&files[filecnt/2], 0, filecnt/2 * sizeof(*files));
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}
files[fileidx].name = estrdup(filename);
files[fileidx].path = path;
if ((bn = strrchr(files[fileidx].name , '/')) != NULL && bn[1] != '\0')
files[fileidx].base = ++bn;
else
files[fileidx].base = files[fileidx].name;
if (given)
files[fileidx].flags |= FF_WARN;
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fileidx++;
}
void remove_file(int n, bool manual)
{
if (n < 0 || n >= filecnt)
return;
if (filecnt == 1) {
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if (!manual)
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fprintf(stderr, "sxiv: no more files to display, aborting\n");
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exit(manual ? EXIT_SUCCESS : EXIT_FAILURE);
}
if (files[n].flags & FF_MARK)
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markcnt--;
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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 >= filecnt)
fileidx = filecnt - 1;
if (n < alternate)
alternate--;
}
void set_timeout(timeout_f handler, int time, bool overwrite)
{
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int i;
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for (i = 0; i < ARRLEN(timeouts); i++) {
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if (timeouts[i].handler == handler) {
if (!timeouts[i].active || overwrite) {
gettimeofday(&timeouts[i].when, 0);
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TV_ADD_MSEC(&timeouts[i].when, time);
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timeouts[i].active = true;
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}
return;
}
}
}
void reset_timeout(timeout_f handler)
{
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int i;
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for (i = 0; i < ARRLEN(timeouts); i++) {
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if (timeouts[i].handler == handler) {
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timeouts[i].active = false;
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return;
}
}
}
bool check_timeouts(struct timeval *t)
{
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int i = 0, tdiff, tmin = -1;
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struct timeval now;
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while (i < ARRLEN(timeouts)) {
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if (timeouts[i].active) {
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gettimeofday(&now, 0);
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tdiff = TV_DIFF(&timeouts[i].when, &now);
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if (tdiff <= 0) {
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timeouts[i].active = false;
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if (timeouts[i].handler != NULL)
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timeouts[i].handler();
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i = tmin = -1;
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} else if (tmin < 0 || tdiff < tmin) {
tmin = tdiff;
}
}
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i++;
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}
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if (tmin > 0 && t != NULL)
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TV_SET_MSEC(t, tmin);
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return tmin > 0;
}
void open_info(void)
{
static pid_t pid;
int pfd[2];
char w[12], h[12];
if (info.f.err != 0 || info.open || win.bar.h == 0)
return;
if (info.fd != -1) {
close(info.fd);
kill(pid, SIGTERM);
info.fd = -1;
}
win.bar.l.buf[0] = '\0';
if (pipe(pfd) < 0)
return;
if ((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 (pid < 0) {
close(pfd[0]);
} else {
fcntl(pfd[0], F_SETFL, O_NONBLOCK);
info.fd = pfd[0];
info.i = info.lastsep = 0;
info.open = true;
}
}
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.fd);
info.fd = -1;
while (waitpid(-1, NULL, WNOHANG) > 0);
}
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void load_image(int new)
{
static int current;
if (new < 0 || new >= filecnt)
return;
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if (win.xwin != None)
win_set_cursor(&win, CURSOR_WATCH);
reset_timeout(slideshow);
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if (new != current)
alternate = current;
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img_close(&img, false);
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while (!img_load(&img, &files[new])) {
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remove_file(new, false);
if (new >= filecnt)
new = filecnt - 1;
else if (new > 0 && new < fileidx)
new--;
}
files[new].flags &= ~FF_WARN;
fileidx = current = new;
info.open = false;
open_info();
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if (img.multi.cnt > 0 && img.multi.animate)
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set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
else
reset_timeout(animate);
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}
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);
}
void update_info(void)
{
unsigned int i, fn, fw;
char title[256];
const char * mark;
bool ow_info;
win_bar_t *l = &win.bar.l, *r = &win.bar.r;
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/* update window title */
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if (mode == MODE_THUMB) {
win_set_title(&win, "sxiv");
} else {
snprintf(title, sizeof(title), "sxiv - %s", files[fileidx].name);
win_set_title(&win, title);
}
/* 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);
ow_info = false;
} else if (tns.initnext < filecnt) {
bar_put(l, "Caching... %0*d", fw, tns.initnext + 1);
ow_info = false;
} else {
ow_info = true;
}
bar_put(r, "%s%0*d/%d", mark, fw, fileidx + 1, filecnt);
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} else {
bar_put(r, "%s", mark);
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if (img.ss.on) {
if (img.ss.delay % 10 != 0)
bar_put(r, "%2.1fs | ", (float)img.ss.delay / 10);
else
bar_put(r, "%ds | ", img.ss.delay / 10);
}
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if (img.gamma != 0)
bar_put(r, "G%+d | ", img.gamma);
bar_put(r, "%3d%% | ", (int) (img.zoom * 100.0));
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if (img.multi.cnt > 0) {
for (fn = 0, i = img.multi.cnt; i > 0; fn++, i /= 10);
bar_put(r, "%0*d/%d | ", fn, img.multi.sel + 1, img.multi.cnt);
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}
bar_put(r, "%0*d/%d", fw, fileidx + 1, filecnt);
ow_info = info.f.err != 0;
}
if (ow_info) {
fn = strlen(files[fileidx].name);
if (fn < l->size &&
win_textwidth(&win.env, files[fileidx].name, fn, true) +
win_textwidth(&win.env, r->buf, r->p - r->buf, true) < win.w)
{
strncpy(l->buf, files[fileidx].name, l->size);
} else {
strncpy(l->buf, files[fileidx].base, l->size);
}
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}
}
void redraw(void)
{
int t;
if (mode == MODE_IMAGE) {
img_render(&img);
if (img.ss.on) {
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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);
}
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update_info();
win_draw(&win);
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reset_timeout(redraw);
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reset_cursor();
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}
void reset_cursor(void)
{
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int i;
cursor_t cursor = CURSOR_NONE;
if (mode == MODE_IMAGE) {
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for (i = 0; i < ARRLEN(timeouts); i++) {
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if (timeouts[i].handler == reset_cursor) {
if (timeouts[i].active)
cursor = CURSOR_ARROW;
break;
}
}
} else {
if (tns.loadnext < tns.end || tns.initnext < filecnt)
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cursor = CURSOR_WATCH;
else
cursor = CURSOR_ARROW;
}
win_set_cursor(&win, cursor);
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}
void animate(void)
{
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if (img_frame_animate(&img)) {
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redraw();
set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
}
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}
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], status;
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));
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);
waitpid(pid, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
error(0, 0, "%s: Exited abnormally", keyhandler.f.cmd);
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++;
}
}
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/* 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 if (info.f.err == 0) {
info.open = false;
open_info();
}
}
free(oldst);
reset_cursor();
redraw();
}
#define MODMASK(mask) ((mask) & (ShiftMask|ControlMask|Mod1Mask))
void on_keypress(XKeyEvent *kev)
{
int i;
unsigned int sh;
KeySym ksym, shksym;
char key;
bool dirty = false;
if (kev->state & ShiftMask) {
kev->state &= ~ShiftMask;
XLookupString(kev, &key, 1, &shksym, NULL);
kev->state |= ShiftMask;
}
XLookupString(kev, &key, 1, &ksym, NULL);
sh = (kev->state & ShiftMask) && ksym != shksym ? ShiftMask : 0;
if (IsModifierKey(ksym))
return;
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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 */
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prefix = prefix * 10 + (int) (key - '0');
return;
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} 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) {
win_set_cursor(&win, CURSOR_ARROW);
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set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
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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;
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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) {
files[sel].flags ^= FF_MARK;
markcnt += files[sel].flags & FF_MARK ? 1 : -1;
tns_mark(&tns, sel, !!(files[sel].flags & FF_MARK));
redraw();
}
break;
case Button4:
case Button5:
if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN,
(bev->state & ControlMask) != 0))
redraw();
break;
}
}
prefix = 0;
}
void run(void)
{
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int xfd;
fd_set fds;
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struct timeval timeout;
bool discard, init_thumb, load_thumb, to_set;
XEvent ev, nextev;
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while (true) {
to_set = check_timeouts(&timeout);
init_thumb = mode == MODE_THUMB && tns.initnext < filecnt;
load_thumb = mode == MODE_THUMB && tns.loadnext < tns.end;
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if ((init_thumb || load_thumb || to_set || info.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);
}
select(xfd + 1, &fds, 0, 0, to_set ? &timeout : NULL);
if (info.fd != -1 && FD_ISSET(info.fd, &fds))
read_info();
}
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:
discard = ev.type == nextev.type;
break;
case KeyPress:
discard = (nextev.type == KeyPress || nextev.type == KeyRelease)
&& ev.xkey.keycode == nextev.xkey.keycode;
break;
}
}
} while (discard);
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switch (ev.type) {
/* handle events */
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case ButtonPress:
on_buttonpress(&ev.xbutton);
break;
case ClientMessage:
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if ((Atom) ev.xclient.data.l[0] == atoms[ATOM_WM_DELETE_WINDOW])
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return;
break;
case ConfigureNotify:
if (win_configure(&win, &ev.xconfigure)) {
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if (mode == MODE_IMAGE) {
img.dirty = true;
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img.checkpan = true;
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} else {
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tns.dirty = true;
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}
if (!resized || win.fullscreen) {
redraw();
set_timeout(clear_resize, TO_REDRAW_RESIZE, false);
resized = true;
} else {
set_timeout(redraw, TO_REDRAW_RESIZE, false);
}
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}
break;
case KeyPress:
on_keypress(&ev.xkey);
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break;
case MotionNotify:
if (mode == MODE_IMAGE) {
win_set_cursor(&win, CURSOR_ARROW);
set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
}
break;
}
}
}
int fncmp(const void *a, const void *b)
{
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return strcoll(((fileinfo_t*) a)->name, ((fileinfo_t*) b)->name);
}
int main(int argc, char **argv)
{
int i, start;
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size_t n;
ssize_t len;
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char *filename;
const char *homedir, *dsuffix = "";
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struct stat fstats;
r_dir_t dir;
signal(SIGPIPE, SIG_IGN);
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parse_options(argc, argv);
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if (options->clean_cache) {
tns_init(&tns, NULL, NULL, NULL, NULL);
tns_clean_cache(&tns);
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exit(EXIT_SUCCESS);
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}
if (options->filecnt == 0 && !options->from_stdin) {
print_usage();
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exit(EXIT_FAILURE);
}
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if (options->recursive || options->from_stdin)
filecnt = 1024;
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else
filecnt = options->filecnt;
files = emalloc(filecnt * sizeof(*files));
memset(files, 0, filecnt * sizeof(*files));
fileidx = 0;
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if (options->from_stdin) {
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n = 0;
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filename = NULL;
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while ((len = getline(&filename, &n, stdin)) > 0) {
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if (filename[len-1] == '\n')
filename[len-1] = '\0';
check_add_file(filename, true);
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}
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)) != NULL) {
check_add_file(filename, false);
free((void*) filename);
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}
r_closedir(&dir);
if (fileidx - start > 1)
qsort(files + start, fileidx - start, sizeof(fileinfo_t), fncmp);
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}
}
if (fileidx == 0)
error(EXIT_FAILURE, 0, "No valid image file given, aborting");
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filecnt = fileidx;
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fileidx = options->startnum < filecnt ? options->startnum : 0;
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win_init(&win);
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img_init(&img, &win);
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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++) {
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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;
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if (options->thumb_mode) {
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mode = MODE_THUMB;
tns_init(&tns, files, &filecnt, &fileidx, &win);
while (!tns_load(&tns, fileidx, false, false))
remove_file(fileidx, false);
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} else {
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mode = MODE_IMAGE;
tns.thumbs = NULL;
load_image(fileidx);
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}
win_open(&win);
win_set_cursor(&win, CURSOR_WATCH);
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atexit(cleanup);
set_timeout(redraw, 25, false);
run();
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return 0;
}