nsxiv/main.c

241 lines
4.4 KiB
C

/* sxiv: main.c
* Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/select.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include "sxiv.h"
#include "image.h"
#include "options.h"
#include "window.h"
void on_keypress(XEvent*);
void on_configurenotify(XEvent*);
void update_title();
static void (*handler[LASTEvent])(XEvent*) = {
[KeyPress] = on_keypress,
[ConfigureNotify] = on_configurenotify
};
img_t img;
win_t win;
const char **filenames;
unsigned int filecnt;
unsigned int fileidx;
unsigned char timeout;
#define TITLE_LEN 256
char win_title[TITLE_LEN];
void run() {
int xfd;
fd_set fds;
struct timeval t;
XEvent ev;
timeout = 0;
while (1) {
if (timeout) {
t.tv_sec = 0;
t.tv_usec = 250;
xfd = ConnectionNumber(win.env.dpy);
FD_ZERO(&fds);
FD_SET(xfd, &fds);
if (!XPending(win.env.dpy) && !select(xfd + 1, &fds, 0, 0, &t)) {
img_render(&img, &win);
timeout = 0;
}
}
if (!XNextEvent(win.env.dpy, &ev) && handler[ev.type])
handler[ev.type](&ev);
}
}
int main(int argc, char **argv) {
int i;
parse_options(argc, argv);
if (!options->filecnt) {
print_usage();
exit(1);
}
if (!(filenames = (const char**) malloc(options->filecnt * sizeof(char*))))
DIE("could not allocate memory");
fileidx = 0;
filecnt = 0;
for (i = 0; i < options->filecnt; ++i) {
if (!(img_load(&img, options->filenames[i]) < 0))
filenames[filecnt++] = options->filenames[i];
}
if (!filecnt) {
fprintf(stderr, "sxiv: no valid image filename given, aborting\n");
exit(1);
}
win_open(&win);
img_init(&img, &win);
img_load(&img, filenames[fileidx]);
img_render(&img, &win);
update_title();
run();
cleanup();
return 0;
}
void cleanup() {
static int in = 0;
if (!in++) {
img_free(&img);
win_close(&win);
}
}
void on_keypress(XEvent *ev) {
char key;
KeySym keysym;
int changed;
if (!ev)
return;
XLookupString(&ev->xkey, &key, 1, &keysym, NULL);
changed = 0;
switch (keysym) {
case XK_Escape:
cleanup();
exit(2);
case XK_space:
key = 'n';
break;
case XK_BackSpace:
key = 'p';
break;
}
switch (key) {
case 'q':
cleanup();
exit(0);
/* navigate through image list */
case 'n':
if (fileidx + 1 < filecnt) {
img_load(&img, filenames[++fileidx]);
changed = 1;
}
break;
case 'p':
if (fileidx > 0) {
img_load(&img, filenames[--fileidx]);
changed = 1;
}
break;
case 'g':
if (fileidx != 0) {
fileidx = 0;
img_load(&img, filenames[fileidx]);
changed = 1;
}
break;
case 'G':
if (fileidx != filecnt - 1) {
fileidx = filecnt - 1;
img_load(&img, filenames[fileidx]);
changed = 1;
}
break;
/* zooming */
case '+':
case '=':
changed = img_zoom_in(&img);
break;
case '-':
changed = img_zoom_out(&img);
break;
/* panning */
case 'h':
changed = img_pan(&img, &win, PAN_LEFT);
break;
case 'j':
changed = img_pan(&img, &win, PAN_DOWN);
break;
case 'k':
changed = img_pan(&img, &win, PAN_UP);
break;
case 'l':
changed = img_pan(&img, &win, PAN_RIGHT);
break;
}
if (changed) {
img_render(&img, &win);
update_title();
timeout = 0;
}
}
void on_configurenotify(XEvent *ev) {
if (!ev)
return;
if (win_configure(&win, &ev->xconfigure)) {
img.checkpan = 1;
timeout = 1;
}
}
void update_title() {
int n;
n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] <%d%%> %s", fileidx + 1,
filecnt, (int) (img.zoom * 100.0), filenames[fileidx]);
if (n >= TITLE_LEN) {
win_title[TITLE_LEN - 2] = '.';
win_title[TITLE_LEN - 3] = '.';
win_title[TITLE_LEN - 4] = '.';
}
win_set_title(&win, win_title);
}