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nsxiv/main.c

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/* 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/>.
*/
#define _POSIX_C_SOURCE 200112L
#define _MAPPINGS_CONFIG
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include "types.h"
#include "commands.h"
#include "image.h"
#include "options.h"
#include "thumbs.h"
#include "util.h"
#include "window.h"
#include "config.h"
enum {
BAR_L_LEN = 512,
BAR_R_LEN = 64,
FILENAME_CNT = 1024,
TITLE_LEN = 256
};
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 clear_resize(void);
appmode_t mode;
img_t img;
tns_t tns;
win_t win;
fileinfo_t *files;
int filecnt, fileidx;
int alternate;
int prefix;
bool resized = false;
const char * const INFO_SCRIPT = ".sxiv/exec/image-info";
char *info_script;
struct {
char l[BAR_L_LEN];
char r[BAR_R_LEN];
} bar;
timeout_t timeouts[] = {
{ { 0, 0 }, false, redraw },
{ { 0, 0 }, false, reset_cursor },
{ { 0, 0 }, false, animate },
{ { 0, 0 }, false, clear_resize },
};
void cleanup(void) {
static bool in = false;
if (!in) {
in = true;
img_close(&img, false);
tns_free(&tns);
win_close(&win);
}
}
void check_add_file(char *filename) {
const char *bn;
if (filename == NULL || *filename == '\0')
return;
if (access(filename, R_OK) < 0) {
warn("could not open file: %s", filename);
return;
}
if (fileidx == filecnt) {
filecnt *= 2;
files = (fileinfo_t*) s_realloc(files, filecnt * sizeof(fileinfo_t));
}
if (*filename != '/') {
files[fileidx].path = absolute_path(filename);
if (files[fileidx].path == NULL) {
warn("could not get absolute path of file: %s\n", filename);
return;
}
}
files[fileidx].loaded = false;
files[fileidx].name = s_strdup(filename);
if (*filename == '/')
files[fileidx].path = files[fileidx].name;
if ((bn = strrchr(files[fileidx].name , '/')) != NULL && bn[1] != '\0')
files[fileidx].base = ++bn;
else
files[fileidx].base = files[fileidx].name;
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");
cleanup();
exit(manual ? EXIT_SUCCESS : EXIT_FAILURE);
}
if (files[n].path != files[n].name)
free((void*) files[n].path);
free((void*) files[n].name);
if (n + 1 < filecnt)
memmove(files + n, files + n + 1, (filecnt - n - 1) * sizeof(fileinfo_t));
if (n + 1 < tns.cnt) {
memmove(tns.thumbs + n, tns.thumbs + n + 1, (tns.cnt - n - 1) *
sizeof(thumb_t));
memset(tns.thumbs + tns.cnt - 1, 0, sizeof(thumb_t));
}
filecnt--;
if (n < tns.cnt)
tns.cnt--;
}
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 read_info(void) {
char cmd[4096];
FILE *outp;
int c, i = 0, n = sizeof(bar.l) - 1;
bool lastsep = false;
if (info_script != NULL) {
snprintf(cmd, sizeof(cmd), "%s \"%s\"", info_script, files[fileidx].name);
outp = popen(cmd, "r");
if (outp == NULL)
goto end;
while (i < n && (c = fgetc(outp)) != EOF) {
if (c == '\n') {
if (!lastsep) {
bar.l[i++] = ' ';
lastsep = true;
}
} else {
bar.l[i++] = c;
lastsep = false;
}
}
pclose(outp);
}
end:
if (lastsep)
i--;
bar.l[i] = '\0';
}
void load_image(int new) {
if (new < 0 || new >= filecnt)
return;
win_set_cursor(&win, CURSOR_WATCH);
img_close(&img, false);
while (!img_load(&img, &files[new])) {
remove_file(new, false);
if (new >= filecnt)
new = filecnt - 1;
}
files[new].loaded = true;
alternate = fileidx;
fileidx = new;
read_info();
if (img.multi.cnt > 0 && img.multi.animate)
set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
else
reset_timeout(animate);
}
void update_info(void) {
unsigned int i, fn, fw, n, len = sizeof(bar.r);
int sel;
char *t = bar.r, title[TITLE_LEN];
bool ow_info;
for (fw = 0, i = filecnt; i > 0; fw++, i /= 10);
sel = mode == MODE_IMAGE ? fileidx : tns.sel;
if (mode == MODE_THUMB) {
win_set_title(&win, "sxiv");
if (tns.cnt == filecnt) {
n = snprintf(t, len, "%0*d/%d", fw, sel + 1, filecnt);
ow_info = true;
} else {
snprintf(bar.l, sizeof(bar.l), "Loading... %0*d/%d",
fw, tns.cnt, filecnt);
bar.r[0] = '\0';
ow_info = false;
}
} else {
snprintf(title, sizeof(title), "sxiv - %s", files[sel].name);
win_set_title(&win, title);
n = snprintf(t, len, "%3d%% ", (int) (img.zoom * 100.0));
if (img.multi.cnt > 0) {
for (fn = 0, i = img.multi.cnt; i > 0; fn++, i /= 10);
n += snprintf(t + n, len - n, "(%0*d/%d) ",
fn, img.multi.sel + 1, img.multi.cnt);
}
n += snprintf(t + n, len - n, "%0*d/%d", fw, sel + 1, filecnt);
ow_info = bar.l[0] == '\0';
}
if (ow_info) {
fn = strlen(files[sel].name);
if (fn < sizeof(bar.l) &&
win_textwidth(files[sel].name, fn, true) +
win_textwidth(bar.r, n, true) < win.w)
{
strncpy(bar.l, files[sel].name, sizeof(bar.l));
} else {
strncpy(bar.l, files[sel].base, sizeof(bar.l));
}
}
win_set_bar_info(&win, bar.l, bar.r);
}
void redraw(void) {
if (mode == MODE_IMAGE)
img_render(&img);
else
tns_render(&tns);
update_info();
win_draw(&win);
reset_timeout(redraw);
reset_cursor();
}
void reset_cursor(void) {
int 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)
cursor = CURSOR_ARROW;
break;
}
}
} else {
if (tns.cnt != filecnt)
cursor = CURSOR_WATCH;
else
cursor = CURSOR_ARROW;
}
win_set_cursor(&win, cursor);
}
void animate(void) {
if (img_frame_animate(&img, false)) {
redraw();
set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
}
}
void clear_resize(void) {
resized = false;
}
bool keymask(const keymap_t *k, unsigned int state) {
return (k->ctrl ? ControlMask : 0) == (state & ControlMask);
}
bool buttonmask(const button_t *b, unsigned int state) {
return ((b->ctrl ? ControlMask : 0) | (b->shift ? ShiftMask : 0)) ==
(state & (ControlMask | ShiftMask));
}
void on_keypress(XKeyEvent *kev) {
int i;
KeySym ksym;
char key;
if (kev == NULL)
return;
XLookupString(kev, &key, 1, &ksym, NULL);
if ((ksym == XK_Escape || (key >= '0' && key <= '9')) &&
(kev->state & ControlMask) == 0)
{
/* number prefix for commands */
prefix = ksym == XK_Escape ? 0 : prefix * 10 + (int) (key - '0');
return;
}
for (i = 0; i < ARRLEN(keys); i++) {
if (keys[i].ksym == ksym && keymask(&keys[i], kev->state)) {
if (keys[i].cmd != NULL && keys[i].cmd(keys[i].arg))
redraw();
prefix = 0;
return;
}
}
}
void on_buttonpress(XButtonEvent *bev) {
int i, sel;
if (bev == NULL)
return;
if (mode == MODE_IMAGE) {
win_set_cursor(&win, CURSOR_ARROW);
set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
for (i = 0; i < ARRLEN(buttons); i++) {
if (buttons[i].button == bev->button &&
buttonmask(&buttons[i], bev->state))
{
if (buttons[i].cmd != NULL && buttons[i].cmd(buttons[i].arg))
redraw();
return;
}
}
} else {
/* thumbnail mode (hard-coded) */
switch (bev->button) {
case Button1:
if ((sel = tns_translate(&tns, bev->x, bev->y)) >= 0) {
if (sel == tns.sel) {
mode = MODE_IMAGE;
set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
load_image(tns.sel);
} else {
tns_highlight(&tns, tns.sel, false);
tns_highlight(&tns, sel, true);
tns.sel = sel;
}
redraw();
break;
}
break;
case Button4:
case Button5:
if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN,
(bev->state & ControlMask) != 0))
redraw();
break;
}
}
}
void run(void) {
int xfd;
fd_set fds;
struct timeval timeout;
XEvent ev, nextev;
bool discard;
redraw();
while (true) {
while (mode == MODE_THUMB && tns.cnt < filecnt &&
XPending(win.env.dpy) == 0)
{
/* load thumbnails */
set_timeout(redraw, TO_REDRAW_THUMBS, false);
if (tns_load(&tns, tns.cnt, &files[tns.cnt], false, false)) {
tns.cnt++;
} else {
remove_file(tns.cnt, false);
if (tns.sel >= tns.cnt)
tns.sel--;
}
if (tns.cnt == filecnt)
redraw();
else
check_timeouts(NULL);
}
while (XPending(win.env.dpy) == 0 && check_timeouts(&timeout)) {
/* wait for timeouts */
xfd = ConnectionNumber(win.env.dpy);
FD_ZERO(&fds);
FD_SET(xfd, &fds);
select(xfd + 1, &fds, 0, 0, &timeout);
}
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);
switch (ev.type) {
/* handle events */
case ButtonPress:
on_buttonpress(&ev.xbutton);
break;
case ClientMessage:
if ((Atom) ev.xclient.data.l[0] == wm_delete_win)
return;
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 || win.fullscreen) {
redraw();
set_timeout(clear_resize, TO_REDRAW_RESIZE, false);
resized = true;
} else {
set_timeout(redraw, TO_REDRAW_RESIZE, false);
}
}
break;
case Expose:
win_expose(&win, &ev.xexpose);
break;
case KeyPress:
on_keypress(&ev.xkey);
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) {
return strcoll(((fileinfo_t*) a)->name, ((fileinfo_t*) b)->name);
}
int main(int argc, char **argv) {
int i, start;
size_t n;
ssize_t len;
char *filename;
const char *homedir;
struct stat fstats;
r_dir_t dir;
parse_options(argc, argv);
if (options->clean_cache) {
tns_init(&tns, 0, NULL);
tns_clean_cache(&tns);
exit(EXIT_SUCCESS);
}
if (options->filecnt == 0) {
print_usage();
exit(EXIT_FAILURE);
}
if (options->recursive || options->from_stdin)
filecnt = FILENAME_CNT;
else
filecnt = options->filecnt;
files = (fileinfo_t*) s_malloc(filecnt * sizeof(fileinfo_t));
fileidx = 0;
/* build file list: */
if (options->from_stdin) {
filename = NULL;
while ((len = get_line(&filename, &n, stdin)) > 0) {
if (filename[len-1] == '\n')
filename[len-1] = '\0';
check_add_file(filename);
}
if (filename != NULL)
free(filename);
} else {
for (i = 0; i < options->filecnt; i++) {
filename = options->filenames[i];
if (stat(filename, &fstats) < 0) {
warn("could not stat file: %s", filename);
continue;
}
if (!S_ISDIR(fstats.st_mode)) {
check_add_file(filename);
} else {
if (!options->recursive) {
warn("ignoring directory: %s", filename);
continue;
}
if (r_opendir(&dir, filename) < 0) {
warn("could not open directory: %s", filename);
continue;
}
start = fileidx;
while ((filename = r_readdir(&dir)) != NULL) {
check_add_file(filename);
free((void*) filename);
}
r_closedir(&dir);
if (fileidx - start > 1)
qsort(files + start, fileidx - start, sizeof(fileinfo_t), fncmp);
}
}
}
if (fileidx == 0) {
fprintf(stderr, "sxiv: no valid image file given, aborting\n");
exit(EXIT_FAILURE);
}
filecnt = fileidx;
fileidx = options->startnum < filecnt ? options->startnum : 0;
win_init(&win);
img_init(&img, &win);
if ((homedir = getenv("HOME")) == NULL) {
warn("could not locate home directory");
} else {
len = strlen(homedir) + strlen(INFO_SCRIPT) + 2;
info_script = (char*) s_malloc(len);
snprintf(info_script, len, "%s/%s", homedir, INFO_SCRIPT);
if (access(info_script, X_OK) != 0) {
free(info_script);
info_script = NULL;
}
}
if (options->thumb_mode) {
mode = MODE_THUMB;
tns_init(&tns, filecnt, &win);
while (!tns_load(&tns, 0, &files[0], false, false))
remove_file(0, false);
tns.cnt = 1;
} else {
mode = MODE_IMAGE;
tns.thumbs = NULL;
load_image(fileidx);
}
win_open(&win);
run();
cleanup();
return 0;
}
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