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nsxiv/events.c

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/* sxiv: events.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.
*/
#define _GENERAL_CONFIG
#define _MAPPINGS_CONFIG
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>
#include "events.h"
#include "image.h"
#include "thumbs.h"
#include "types.h"
#include "util.h"
#include "window.h"
#include "config.h"
/* timeouts in milliseconds: */
enum {
TO_WIN_RESIZE = 75,
TO_CURSOR_HIDE = 1500,
TO_THUMBS_LOAD = 200
};
void cleanup();
void remove_file(int, unsigned char);
void load_image(int);
void update_title();
extern appmode_t mode;
extern img_t img;
extern tns_t tns;
extern win_t win;
extern fileinfo_t *files;
extern int filecnt, fileidx;
int timo_cursor;
int timo_redraw;
void redraw() {
if (mode == MODE_NORMAL) {
img_render(&img, &win);
if (timo_cursor)
win_set_cursor(&win, CURSOR_ARROW);
else
win_set_cursor(&win, CURSOR_NONE);
} else {
tns_render(&tns, &win);
}
update_title();
timo_redraw = 0;
}
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)
return;
XLookupString(kev, &key, 1, &ksym, NULL);
for (i = 0; i < LEN(keys); i++) {
if (keymask(&keys[i], kev->state) && ksym == keys[i].ksym) {
if (keys[i].handler && keys[i].handler(keys[i].arg))
redraw();
return;
}
}
}
void on_buttonpress(XButtonEvent *bev) {
int i, sel;
if (!bev)
return;
if (mode == MODE_NORMAL) {
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = TO_CURSOR_HIDE;
for (i = 0; i < LEN(buttons); i++) {
if (buttonmask(&buttons[i], bev->state) &&
bev->button == buttons[i].button)
{
if (buttons[i].handler && buttons[i].handler(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) {
load_image(tns.sel);
mode = MODE_NORMAL;
timo_cursor = TO_CURSOR_HIDE;
} else {
tns_highlight(&tns, &win, tns.sel, False);
tns_highlight(&tns, &win, sel, True);
tns.sel = sel;
}
redraw();
break;
}
break;
case Button4:
case Button5:
if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN))
redraw();
break;
}
}
}
void run() {
int xfd, timeout;
fd_set fds;
struct timeval tt, t0, t1;
XEvent ev;
timo_cursor = mode == MODE_NORMAL ? TO_CURSOR_HIDE : 0;
redraw();
while (1) {
if (mode == MODE_THUMBS && tns.cnt < filecnt) {
/* load thumbnails */
win_set_cursor(&win, CURSOR_WATCH);
gettimeofday(&t0, 0);
while (tns.cnt < filecnt && !XPending(win.env.dpy)) {
if (tns_load(&tns, tns.cnt, &files[tns.cnt], 0))
tns.cnt++;
else
remove_file(tns.cnt, 0);
gettimeofday(&t1, 0);
if (TIMEDIFF(&t1, &t0) >= TO_THUMBS_LOAD)
break;
}
if (tns.cnt == filecnt)
win_set_cursor(&win, CURSOR_ARROW);
if (!XPending(win.env.dpy)) {
redraw();
continue;
} else {
timo_redraw = TO_THUMBS_LOAD;
}
} else if (timo_cursor || timo_redraw) {
/* check active timeouts */
gettimeofday(&t0, 0);
timeout = MIN(timo_cursor + 1, timo_redraw + 1);
MSEC_TO_TIMEVAL(timeout, &tt);
xfd = ConnectionNumber(win.env.dpy);
FD_ZERO(&fds);
FD_SET(xfd, &fds);
if (!XPending(win.env.dpy))
select(xfd + 1, &fds, 0, 0, &tt);
gettimeofday(&t1, 0);
timeout = MIN(TIMEDIFF(&t1, &t0), timeout);
/* timeouts fired? */
if (timo_cursor) {
timo_cursor = MAX(0, timo_cursor - timeout);
if (!timo_cursor)
win_set_cursor(&win, CURSOR_NONE);
}
if (timo_redraw) {
timo_redraw = MAX(0, timo_redraw - timeout);
if (!timo_redraw)
redraw();
}
if ((timo_cursor || timo_redraw) && !XPending(win.env.dpy))
continue;
}
if (!XNextEvent(win.env.dpy, &ev)) {
/* handle events */
switch (ev.type) {
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)) {
timo_redraw = TO_WIN_RESIZE;
if (mode == MODE_NORMAL)
img.checkpan = 1;
else
tns.dirty = 1;
}
break;
case KeyPress:
on_keypress(&ev.xkey);
break;
case MotionNotify:
if (!timo_cursor)
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = TO_CURSOR_HIDE;
break;
}
}
}
}
/* handler functions for key and button mappings: */
int quit(arg_t a) {
cleanup();
exit(0);
}
int reload(arg_t a) {
if (mode == MODE_NORMAL) {
load_image(fileidx);
return 1;
} else {
return 0;
}
}
int toggle_fullscreen(arg_t a) {
win_toggle_fullscreen(&win);
if (mode == MODE_NORMAL)
img.checkpan = 1;
else
tns.dirty = 1;
timo_redraw = TO_WIN_RESIZE;
return 0;
}
int toggle_antialias(arg_t a) {
if (mode == MODE_NORMAL) {
img_toggle_antialias(&img);
return 1;
} else {
return 0;
}
}
int toggle_alpha(arg_t a) {
if (mode == MODE_NORMAL) {
img.alpha ^= 1;
return 1;
} else {
return 0;
}
}
int switch_mode(arg_t a) {
if (mode == MODE_NORMAL) {
if (!tns.thumbs)
tns_init(&tns, filecnt);
img_close(&img, 0);
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = 0;
tns.sel = fileidx;
tns.dirty = 1;
mode = MODE_THUMBS;
} else {
timo_cursor = TO_CURSOR_HIDE;
load_image(tns.sel);
mode = MODE_NORMAL;
}
return 1;
}
int navigate(arg_t a) {
int n = (int) a;
if (mode == MODE_NORMAL) {
n += fileidx;
if (n < 0)
n = 0;
if (n >= filecnt)
n = filecnt - 1;
if (n != fileidx) {
load_image(n);
return 1;
}
}
return 0;
}
int first(arg_t a) {
if (mode == MODE_NORMAL && fileidx != 0) {
load_image(0);
return 1;
} else if (mode == MODE_THUMBS && tns.sel != 0) {
tns.sel = 0;
tns.dirty = 1;
return 1;
} else {
return 0;
}
}
int last(arg_t a) {
if (mode == MODE_NORMAL && fileidx != filecnt - 1) {
load_image(filecnt - 1);
return 1;
} else if (mode == MODE_THUMBS && tns.sel != tns.cnt - 1) {
tns.sel = tns.cnt - 1;
tns.dirty = 1;
return 1;
} else {
return 0;
}
}
int remove_image(arg_t a) {
if (mode == MODE_NORMAL) {
remove_file(fileidx, 1);
load_image(fileidx >= filecnt ? filecnt - 1 : fileidx);
return 1;
} else if (tns.sel < tns.cnt) {
remove_file(tns.sel, 1);
tns.dirty = 1;
if (tns.sel >= tns.cnt)
tns.sel = tns.cnt - 1;
return 1;
} else {
return 0;
}
}
int move(arg_t a) {
direction_t dir = (direction_t) a;
if (mode == MODE_NORMAL)
return img_pan(&img, &win, dir, 0);
else
return tns_move_selection(&tns, &win, dir);
}
int pan_screen(arg_t a) {
direction_t dir = (direction_t) a;
if (mode == MODE_NORMAL)
return img_pan(&img, &win, dir, 1);
else
return 0;
}
int pan_edge(arg_t a) {
direction_t dir = (direction_t) a;
if (mode == MODE_NORMAL)
return img_pan_edge(&img, &win, dir);
else
return 0;
}
/* Xlib helper function for drag() */
Bool is_motionnotify(Display *d, XEvent *e, XPointer a) {
return e != NULL && e->type == MotionNotify;
}
int drag(arg_t a) {
int dx = 0, dy = 0, i, ox, oy, x, y;
unsigned int ui;
Bool dragging = True, next = False;
XEvent e;
Window w;
if (mode != MODE_NORMAL)
return 0;
if (!XQueryPointer(win.env.dpy, win.xwin, &w, &w, &i, &i, &ox, &oy, &ui))
return 0;
win_set_cursor(&win, CURSOR_HAND);
while (dragging) {
if (!next)
XMaskEvent(win.env.dpy,
ButtonPressMask | ButtonReleaseMask | PointerMotionMask, &e);
switch (e.type) {
case ButtonPress:
case ButtonRelease:
dragging = False;
break;
case MotionNotify:
x = e.xmotion.x;
y = e.xmotion.y;
if (x >= 0 && x <= win.w && y >= 0 && y <= win.h) {
dx += x - ox;
dy += y - oy;
}
ox = x;
oy = y;
break;
}
if (dragging)
next = XCheckIfEvent(win.env.dpy, &e, is_motionnotify, None);
if ((!dragging || !next) && (dx != 0 || dy != 0)) {
if (img_move(&img, &win, dx, dy))
img_render(&img, &win);
dx = dy = 0;
}
}
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = TO_CURSOR_HIDE;
timo_redraw = 0;
return 0;
}
int rotate(arg_t a) {
direction_t dir = (direction_t) a;
if (mode == MODE_NORMAL) {
if (dir == DIR_LEFT) {
img_rotate_left(&img, &win);
return 1;
} else if (dir == DIR_RIGHT) {
img_rotate_right(&img, &win);
return 1;
}
}
return 0;
}
int zoom(arg_t a) {
int scale = (int) a;
if (mode != MODE_NORMAL)
return 0;
if (scale > 0)
return img_zoom_in(&img, &win);
else if (scale < 0)
return img_zoom_out(&img, &win);
else
return img_zoom(&img, &win, 1.0);
}
int fit_to_win(arg_t a) {
int ret;
if (mode == MODE_NORMAL) {
if ((ret = img_fit_win(&img, &win)))
img_center(&img, &win);
return ret;
} else {
return 0;
}
}
int fit_to_img(arg_t a) {
int ret, x, y;
unsigned int w, h;
if (mode == MODE_NORMAL) {
x = MAX(0, win.x + img.x);
y = MAX(0, win.y + img.y);
w = img.w * img.zoom;
h = img.h * img.zoom;
if ((ret = win_moveresize(&win, x, y, w, h))) {
img.x = x - win.x;
img.y = y - win.y;
}
return ret;
} else {
return 0;
}
}
int open_with(arg_t a) {
const char *prog = (const char*) a;
pid_t pid;
if (!prog || !*prog)
return 0;
if((pid = fork()) == 0) {
execlp(prog, prog,
files[mode == MODE_NORMAL ? fileidx : tns.sel].path, NULL);
warn("could not exec: %s", prog);
exit(1);
} else if (pid < 0) {
warn("could not for. program was: %s", prog);
}
return 0;
}
int run_command(arg_t a) {
const char *cline = (const char*) a;
char *cn, *cmdline;
const char *co, *fpath;
int fpcnt, fplen, status;
pid_t pid;
if (!cline || !*cline)
return 0;
/* build command line: */
fpcnt = 0;
co = cline - 1;
while ((co = strchr(co + 1, '#')))
fpcnt++;
if (!fpcnt)
return 0;
fpath = files[mode == MODE_NORMAL ? fileidx : tns.sel].path;
fplen = strlen(fpath);
cn = cmdline = (char*) s_malloc((strlen(cline) + fpcnt * (fplen + 2)) *
sizeof(char));
/* replace all '#' with filename: */
for (co = cline; *co; co++) {
if (*co == '#') {
*cn++ = '"';
strcpy(cn, fpath);
cn += fplen;
*cn++ = '"';
} else {
*cn++ = *co;
}
}
*cn = '\0';
win_set_cursor(&win, CURSOR_WATCH);
if ((pid = fork()) == 0) {
execl("/bin/sh", "/bin/sh", "-c", cmdline, NULL);
warn("could not exec: /bin/sh");
exit(1);
} else if (pid < 0) {
warn("could not fork. command line was: %s", cmdline);
goto end;
}
waitpid(pid, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
warn("child exited with non-zero return value: %d. command line was: %s",
WEXITSTATUS(status), cmdline);
if (mode == MODE_NORMAL) {
if (fileidx < tns.cnt)
tns_load(&tns, fileidx, &files[fileidx], 1);
img_close(&img, 1);
load_image(fileidx);
} else {
if (!tns_load(&tns, tns.sel, &files[tns.sel], 0)) {
remove_file(tns.sel, 0);
tns.dirty = 1;
if (tns.sel >= tns.cnt)
tns.sel = tns.cnt - 1;
}
}
end:
if (mode == MODE_THUMBS)
win_set_cursor(&win, CURSOR_ARROW);
/* else: cursor is reset in redraw() */
free(cmdline);
return 1;
}
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