nsxiv/main.c

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/* 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.
*/
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#include <stdlib.h>
#include <stdio.h>
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#include <sys/select.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
#include <X11/keysym.h>
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#include "sxiv.h"
#include "image.h"
#include "window.h"
void on_keypress(XEvent*);
void on_buttonpress(XEvent*);
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void on_buttonrelease(XEvent*);
void on_motionnotify(XEvent*);
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void on_configurenotify(XEvent*);
void update_title();
static void (*handler[LASTEvent])(XEvent*) = {
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[KeyPress] = on_keypress,
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[ButtonPress] = on_buttonpress,
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[ButtonRelease] = on_buttonrelease,
[MotionNotify] = on_motionnotify,
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[ConfigureNotify] = on_configurenotify
};
img_t img;
win_t win;
const char **filenames;
int filecnt, fileidx;
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unsigned char timeout;
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int mox;
int moy;
#define TITLE_LEN 256
char win_title[TITLE_LEN];
void run() {
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int xfd;
fd_set fds;
struct timeval t;
XEvent ev;
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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);
}
}
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int main(int argc, char **argv) {
int i;
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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);
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img_init(&img, &win);
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img_load(&img, filenames[fileidx]);
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img_render(&img, &win);
update_title();
run();
cleanup();
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return 0;
}
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void cleanup() {
static int in = 0;
if (!in++) {
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img_free(&img);
win_close(&win);
}
}
void on_keypress(XEvent *ev) {
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char key;
KeySym ksym;
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int changed;
if (!ev)
return;
XLookupString(&ev->xkey, &key, 1, &ksym, NULL);
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changed = 0;
switch (ksym) {
case XK_Escape:
cleanup();
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exit(2);
case XK_q:
cleanup();
exit(0);
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/* navigate image list */
case XK_n:
case XK_space:
if (fileidx + 1 < filecnt) {
img_load(&img, filenames[++fileidx]);
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changed = 1;
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}
break;
case XK_p:
case XK_BackSpace:
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if (fileidx > 0) {
img_load(&img, filenames[--fileidx]);
changed = 1;
}
break;
case XK_bracketleft:
if (fileidx != 0) {
fileidx = MAX(0, fileidx - 10);
img_load(&img, filenames[fileidx]);
changed = 1;
}
break;
case XK_bracketright:
if (fileidx != filecnt - 1) {
fileidx = MIN(fileidx + 10, filecnt - 1);
img_load(&img, filenames[fileidx]);
changed = 1;
}
break;
case XK_g:
if (fileidx != 0) {
fileidx = 0;
img_load(&img, filenames[fileidx]);
changed = 1;
}
break;
case XK_G:
if (fileidx != filecnt - 1) {
fileidx = filecnt - 1;
img_load(&img, filenames[fileidx]);
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changed = 1;
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}
break;
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/* zooming */
case XK_plus:
case XK_equal:
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changed = img_zoom_in(&img);
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break;
case XK_minus:
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changed = img_zoom_out(&img);
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break;
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/* panning */
case XK_h:
case XK_Left:
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changed = img_pan(&img, &win, PAN_LEFT);
break;
case XK_j:
case XK_Down:
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changed = img_pan(&img, &win, PAN_DOWN);
break;
case XK_k:
case XK_Up:
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changed = img_pan(&img, &win, PAN_UP);
break;
case XK_l:
case XK_Right:
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changed = img_pan(&img, &win, PAN_RIGHT);
break;
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/* rotation */
case XK_less:
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changed = img_rotate_left(&img, &win);
break;
case XK_greater:
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changed = img_rotate_right(&img, &win);
break;
/* control window */
case XK_f:
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win_toggle_fullscreen(&win);
break;
/* miscellaneous */
case XK_a:
changed = img_toggle_antialias(&img);
break;
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}
if (changed) {
img_render(&img, &win);
update_title();
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timeout = 0;
}
}
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void on_buttonpress(XEvent *ev) {
int changed;
unsigned int mask;
if (!ev)
return;
mask = CLEANMASK(ev->xbutton.state);
changed = 0;
switch (ev->xbutton.button) {
case Button1:
if (fileidx + 1 < filecnt) {
img_load(&img, filenames[++fileidx]);
changed = 1;
}
break;
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case Button2:
mox = ev->xbutton.x;
moy = ev->xbutton.y;
win_set_cursor(&win, CURSOR_HAND);
break;
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case Button3:
if (fileidx > 0) {
img_load(&img, filenames[--fileidx]);
changed = 1;
}
break;
case Button4:
if (mask == ControlMask)
changed = img_zoom_in(&img);
else if (mask == ShiftMask)
changed = img_pan(&img, &win, PAN_LEFT);
else
changed = img_pan(&img, &win, PAN_UP);
break;
case Button5:
if (mask == ControlMask)
changed = img_zoom_out(&img);
else if (mask == ShiftMask)
changed = img_pan(&img, &win, PAN_RIGHT);
else
changed = img_pan(&img, &win, PAN_DOWN);
break;
case 6:
changed = img_pan(&img, &win, PAN_LEFT);
break;
case 7:
changed = img_pan(&img, &win, PAN_RIGHT);
break;
}
if (changed) {
img_render(&img, &win);
update_title();
timeout = 0;
}
}
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void on_buttonrelease(XEvent *ev) {
if (!ev)
return;
if (ev->xbutton.button == Button2)
win_set_cursor(&win, CURSOR_ARROW);
}
void on_motionnotify(XEvent *ev) {
XMotionEvent *m;
if (!ev)
return;
m = &ev->xmotion;
if (m->x >= 0 && m->x <= win.w && m->y >= 0 && m->y <= win.h) {
if (img_move(&img, &win, m->x - mox, m->y - moy))
timeout = 1;
mox = m->x;
moy = m->y;
}
}
void on_configurenotify(XEvent *ev) {
if (!ev)
return;
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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);
}