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zeniba-nsxiv/main.c
Bert ba293b09df Center zoomed area
2011-04-19 13:27:20 +02:00

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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.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include "image.h"
#include "options.h"
#include "thumbs.h"
#include "util.h"
#include "window.h"
#define FNAME_CNT 1024
#define TITLE_LEN 256
typedef enum {
MODE_NORMAL = 0,
MODE_THUMBS
} appmode_t;
typedef struct {
KeySym ksym;
Bool reload;
const char *cmdline;
} command_t;
#define MAIN_C
#include "config.h"
void run();
appmode_t mode;
img_t img;
tns_t tns;
win_t win;
const char **filenames;
int filecnt, fileidx;
size_t filesize;
char win_title[TITLE_LEN];
void cleanup() {
static int in = 0;
if (!in++) {
img_close(&img, 0);
tns_free(&tns);
win_close(&win);
}
}
void remove_file(int n, unsigned char silent) {
if (n < 0 || n >= filecnt)
return;
if (filecnt == 1) {
if (!silent)
fprintf(stderr, "sxiv: no more files to display, aborting\n");
cleanup();
exit(!silent);
}
if (n + 1 < filecnt)
memmove(filenames + n, filenames + n + 1, (filecnt - n - 1) *
sizeof(const char*));
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;
}
int load_image(int new) {
struct stat fstats;
if (new >= 0 && new < filecnt) {
win_set_cursor(&win, CURSOR_WATCH);
img_close(&img, 0);
while (!img_load(&img, filenames[new])) {
remove_file(new, 0);
if (new >= filecnt)
new = filecnt - 1;
}
fileidx = new;
if (!stat(filenames[new], &fstats))
filesize = fstats.st_size;
else
filesize = 0;
/* cursor is reset in redraw() */
}
return 1;
}
void update_title() {
int n;
float size;
const char *unit;
if (mode == MODE_THUMBS) {
n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] %s",
tns.cnt ? tns.sel + 1 : 0, tns.cnt,
tns.cnt ? filenames[tns.sel] : "");
} else {
size = filesize;
size_readable(&size, &unit);
n = snprintf(win_title, TITLE_LEN, "sxiv: [%d/%d] <%d%%> (%.2f%s) %s",
fileidx + 1, filecnt, (int) (img.zoom * 100.0), size, unit,
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);
}
int check_append(const char *filename) {
if (!filename)
return 0;
if (access(filename, R_OK)) {
warn("could not open file: %s", filename);
return 0;
} else {
if (fileidx == filecnt) {
filecnt *= 2;
filenames = (const char**) s_realloc(filenames,
filecnt * sizeof(const char*));
}
filenames[fileidx++] = filename;
return 1;
}
}
int fncmp(const void *a, const void *b) {
return strcoll(*((char* const*) a), *((char* const*) b));
}
int main(int argc, char **argv) {
int i, start;
const char *filename;
struct stat fstats;
r_dir_t dir;
parse_options(argc, argv);
if (options->clean_cache) {
tns_init(&tns, 0);
tns_clean_cache(&tns);
exit(0);
}
if (!options->filecnt) {
print_usage();
exit(1);
}
if (options->recursive || options->from_stdin)
filecnt = FNAME_CNT;
else
filecnt = options->filecnt;
filenames = (const char**) s_malloc(filecnt * sizeof(const char*));
fileidx = 0;
if (options->from_stdin) {
while ((filename = readline(stdin))) {
if (!*filename || !check_append(filename))
free((void*) filename);
}
} else {
for (i = 0; i < options->filecnt; ++i) {
filename = options->filenames[i];
if (stat(filename, &fstats) || !S_ISDIR(fstats.st_mode)) {
check_append(filename);
} else {
if (!options->recursive) {
warn("ignoring directory: %s", filename);
continue;
}
if (r_opendir(&dir, filename)) {
warn("could not open directory: %s", filename);
continue;
}
start = fileidx;
while ((filename = r_readdir(&dir))) {
if (!check_append(filename))
free((void*) filename);
}
r_closedir(&dir);
if (fileidx - start > 1)
qsort(filenames + start, fileidx - start, sizeof(char*), fncmp);
}
}
}
filecnt = fileidx;
fileidx = 0;
if (!filecnt) {
fprintf(stderr, "sxiv: no valid image file given, aborting\n");
exit(1);
}
win_init(&win);
img_init(&img, &win);
if (options->thumbnails) {
mode = MODE_THUMBS;
tns_init(&tns, filecnt);
while (!tns_load(&tns, 0, filenames[0], 0))
remove_file(0, 0);
tns.cnt = 1;
} else {
mode = MODE_NORMAL;
tns.thumbs = NULL;
load_image(fileidx);
}
win_open(&win);
run();
cleanup();
return 0;
}
#if EXT_COMMANDS
int run_command(const char *cline, Bool reload) {
int fncnt, fnlen;
char *cn, *cmdline;
const char *co, *fname;
pid_t pid;
int ret, status;
if (!cline || !*cline)
return 0;
fncnt = 0;
co = cline - 1;
while ((co = strchr(co + 1, '#')))
++fncnt;
if (!fncnt)
return 0;
ret = 0;
fname = filenames[mode == MODE_NORMAL ? fileidx : tns.sel];
fnlen = strlen(fname);
cn = cmdline = (char*) s_malloc((strlen(cline) + fncnt * (fnlen + 2)) *
sizeof(char));
/* replace all '#' with filename */
for (co = cline; *co; ++co) {
if (*co == '#') {
*cn++ = '"';
strcpy(cn, fname);
cn += fnlen;
*cn++ = '"';
} else {
*cn++ = *co;
}
}
*cn = '\0';
if ((pid = fork()) == 0) {
execlp("/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);
} else if (reload) {
waitpid(pid, &status, 0);
if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
ret = 1;
else
warn("child exited with non-zero return value: %d. command line was: %s",
WEXITSTATUS(status), cmdline);
}
free(cmdline);
return ret;
}
#endif /* EXT_COMMANDS */
/* event handling */
#define TO_WIN_RESIZE 75000
#define TO_IMAGE_DRAG 1000
#define TO_CURSOR_HIDE 1500000
#define TO_THUMBS_LOAD 75000
int timo_cursor;
int timo_redraw;
unsigned char drag;
int mox, moy;
void redraw() {
if (mode == MODE_NORMAL) {
img_render(&img, &win);
if (timo_cursor)
win_set_cursor(&win, CURSOR_ARROW);
else if (!drag)
win_set_cursor(&win, CURSOR_NONE);
} else {
tns_render(&tns, &win);
}
update_title();
timo_redraw = 0;
}
void on_keypress(XKeyEvent *kev) {
int x, y;
unsigned int w, h;
char key;
KeySym ksym;
int changed;
if (!kev)
return;
XLookupString(kev, &key, 1, &ksym, NULL);
changed = 0;
#if EXT_COMMANDS
/* external commands from commands.h */
if (CLEANMASK(kev->state) & ControlMask) {
for (x = 0; x < LEN(commands); ++x) {
if (commands[x].ksym == ksym) {
win_set_cursor(&win, CURSOR_WATCH);
if (run_command(commands[x].cmdline, commands[x].reload)) {
if (mode == MODE_NORMAL) {
if (fileidx < tns.cnt)
tns_load(&tns, fileidx, filenames[fileidx], 1);
img_close(&img, 1);
load_image(fileidx);
} else {
if (!tns_load(&tns, tns.sel, filenames[tns.sel], 0)) {
remove_file(tns.sel, 0);
tns.dirty = 1;
if (tns.sel >= tns.cnt)
tns.sel = tns.cnt - 1;
}
}
redraw();
}
if (mode == MODE_THUMBS)
win_set_cursor(&win, CURSOR_ARROW);
else if (!timo_cursor)
win_set_cursor(&win, CURSOR_NONE);
return;
}
}
}
#endif
if (mode == MODE_NORMAL) {
switch (ksym) {
/* navigate image list */
case XK_n:
case XK_space:
if (fileidx + 1 < filecnt)
changed = load_image(fileidx + 1);
break;
case XK_p:
case XK_BackSpace:
if (fileidx > 0)
changed = load_image(fileidx - 1);
break;
case XK_bracketleft:
if (fileidx != 0)
changed = load_image(MAX(0, fileidx - 10));
break;
case XK_bracketright:
if (fileidx != filecnt - 1)
changed = load_image(MIN(fileidx + 10, filecnt - 1));
break;
case XK_g:
if (fileidx != 0)
changed = load_image(0);
break;
case XK_G:
if (fileidx != filecnt - 1)
changed = load_image(filecnt - 1);
break;
/* zooming */
case XK_plus:
case XK_equal:
changed = img_zoom_in(&img, &win);
break;
case XK_minus:
changed = img_zoom_out(&img, &win);
break;
case XK_0:
changed = img_zoom(&img, &win, 1.0);
break;
case XK_w:
if ((changed = img_fit_win(&img, &win)))
img_center(&img, &win);
break;
/* panning */
case XK_h:
case XK_Left:
changed = img_pan(&img, &win, PAN_LEFT);
break;
case XK_j:
case XK_Down:
changed = img_pan(&img, &win, PAN_DOWN);
break;
case XK_k:
case XK_Up:
changed = img_pan(&img, &win, PAN_UP);
break;
case XK_l:
case XK_Right:
changed = img_pan(&img, &win, PAN_RIGHT);
break;
/* rotation */
case XK_less:
img_rotate_left(&img, &win);
changed = 1;
break;
case XK_greater:
img_rotate_right(&img, &win);
changed = 1;
break;
/* control window */
case XK_W:
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 ((changed = win_moveresize(&win, x, y, w, h))) {
img.x = x - win.x;
img.y = y - win.y;
}
break;
/* switch to thumbnail mode */
case XK_Return:
if (!tns.thumbs)
tns_init(&tns, filecnt);
img_close(&img, 0);
mode = MODE_THUMBS;
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = 0;
tns.sel = fileidx;
changed = tns.dirty = 1;
break;
/* miscellaneous */
case XK_a:
img_toggle_antialias(&img);
changed = 1;
break;
case XK_A:
img.alpha ^= 1;
changed = 1;
break;
case XK_D:
remove_file(fileidx, 1);
changed = load_image(fileidx >= filecnt ? filecnt - 1 : fileidx);
break;
case XK_r:
changed = load_image(fileidx);
break;
}
} else {
/* thumbnail mode */
switch (ksym) {
/* open selected image */
case XK_Return:
load_image(tns.sel);
mode = MODE_NORMAL;
changed = 1;
break;
/* move selection */
case XK_h:
case XK_Left:
changed = tns_move_selection(&tns, &win, TNS_LEFT);
break;
case XK_j:
case XK_Down:
changed = tns_move_selection(&tns, &win, TNS_DOWN);
break;
case XK_k:
case XK_Up:
changed = tns_move_selection(&tns, &win, TNS_UP);
break;
case XK_l:
case XK_Right:
changed = tns_move_selection(&tns, &win, TNS_RIGHT);
break;
case XK_g:
if (tns.sel != 0) {
tns.sel = 0;
changed = tns.dirty = 1;
}
break;
case XK_G:
if (tns.sel != tns.cnt - 1) {
tns.sel = tns.cnt - 1;
changed = tns.dirty = 1;
}
break;
/* miscellaneous */
case XK_D:
if (tns.sel < tns.cnt) {
remove_file(tns.sel, 1);
changed = tns.dirty = 1;
if (tns.sel >= tns.cnt)
tns.sel = tns.cnt - 1;
}
break;
}
}
/* common key mappings */
switch (ksym) {
case XK_q:
cleanup();
exit(0);
case XK_f:
win_toggle_fullscreen(&win);
/* render on next configurenotify */
break;
}
if (changed)
redraw();
}
void on_buttonpress(XButtonEvent *bev) {
int changed, sel;
unsigned int mask;
if (!bev)
return;
mask = CLEANMASK(bev->state);
changed = 0;
if (mode == MODE_NORMAL) {
if (!drag) {
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = TO_CURSOR_HIDE;
}
switch (bev->button) {
case Button1:
if (fileidx + 1 < filecnt)
changed = load_image(fileidx + 1);
break;
case Button2:
mox = bev->x;
moy = bev->y;
win_set_cursor(&win, CURSOR_HAND);
timo_cursor = 0;
drag = 1;
break;
case Button3:
if (fileidx > 0)
changed = load_image(fileidx - 1);
break;
case Button4:
if (mask == ControlMask)
changed = img_zoom_in(&img, &win);
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, &win);
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;
}
} else {
/* thumbnail mode */
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;
}
changed = 1;
break;
}
break;
case Button4:
changed = tns_scroll(&tns, TNS_UP);
break;
case Button5:
changed = tns_scroll(&tns, TNS_DOWN);
break;
}
}
if (changed)
redraw();
}
void on_motionnotify(XMotionEvent *mev) {
if (!mev)
return;
if (mev->x >= 0 && mev->x <= win.w && mev->y >= 0 && mev->y <= win.h) {
if (img_move(&img, &win, mev->x - mox, mev->y - moy))
timo_redraw = TO_IMAGE_DRAG;
mox = mev->x;
moy = mev->y;
}
}
void run() {
int xfd, timeout;
fd_set fds;
struct timeval tt, t0, t1;
XEvent ev;
drag = 0;
timo_cursor = mode == MODE_NORMAL ? TO_CURSOR_HIDE : 0;
redraw();
while (1) {
if (mode == MODE_THUMBS && tns.cnt < filecnt) {
win_set_cursor(&win, CURSOR_WATCH);
gettimeofday(&t0, 0);
while (tns.cnt < filecnt && !XPending(win.env.dpy)) {
if (tns_load(&tns, tns.cnt, filenames[tns.cnt], 0))
++tns.cnt;
else
remove_file(tns.cnt, 0);
gettimeofday(&t1, 0);
if (TV_TO_DOUBLE(t1) - TV_TO_DOUBLE(t0) >= 0.25)
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) {
gettimeofday(&t0, 0);
if (timo_cursor && timo_redraw)
timeout = MIN(timo_cursor, timo_redraw);
else if (timo_cursor)
timeout = timo_cursor;
else
timeout = timo_redraw;
tt.tv_sec = timeout / 1000000;
tt.tv_usec = timeout % 1000000;
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((TV_TO_DOUBLE(t1) - TV_TO_DOUBLE(t0)) * 1000000, 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 (!XPending(win.env.dpy) && (timo_cursor || timo_redraw))
continue;
}
if (!XNextEvent(win.env.dpy, &ev)) {
switch (ev.type) {
case KeyPress:
on_keypress(&ev.xkey);
break;
case ButtonPress:
on_buttonpress(&ev.xbutton);
break;
case ButtonRelease:
if (ev.xbutton.button == Button2) {
drag = 0;
if (mode == MODE_NORMAL) {
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = TO_CURSOR_HIDE;
}
}
break;
case MotionNotify:
if (drag) {
on_motionnotify(&ev.xmotion);
} else if (mode == MODE_NORMAL) {
if (!timo_cursor)
win_set_cursor(&win, CURSOR_ARROW);
timo_cursor = TO_CURSOR_HIDE;
}
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 ClientMessage:
if ((Atom) ev.xclient.data.l[0] == wm_delete_win)
return;
break;
}
}
}
}
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