zeniba-nsxiv/main.c

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/* Copyright 2011-2013 Bert Muennich
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*
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* This file is part of sxiv.
*
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* 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.
*
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* 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/>.
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*/
#define _POSIX_C_SOURCE 200112L
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#define _MAPPINGS_CONFIG
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#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>
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#include "types.h"
#include "commands.h"
#include "image.h"
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#include "options.h"
#include "thumbs.h"
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#include "util.h"
#include "window.h"
#include "config.h"
enum {
BAR_L_LEN = 512,
BAR_R_LEN = 64,
FILENAME_CNT = 1024,
TITLE_LEN = 256
};
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typedef struct {
struct timeval when;
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bool active;
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timeout_f handler;
} timeout_t;
/* timeout handler functions: */
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void redraw(void);
void reset_cursor(void);
void animate(void);
void clear_resize(void);
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appmode_t mode;
img_t img;
tns_t tns;
win_t win;
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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;
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timeout_t timeouts[] = {
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{ { 0, 0 }, false, redraw },
{ { 0, 0 }, false, reset_cursor },
{ { 0, 0 }, false, animate },
{ { 0, 0 }, false, clear_resize },
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};
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void cleanup(void) {
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static bool in = false;
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if (!in) {
in = true;
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img_close(&img, false);
tns_free(&tns);
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win_close(&win);
}
}
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void check_add_file(char *filename) {
const char *bn;
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if (filename == NULL || *filename == '\0')
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return;
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if (access(filename, R_OK) < 0) {
warn("could not open file: %s", filename);
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return;
}
if (fileidx == filecnt) {
filecnt *= 2;
files = (fileinfo_t*) s_realloc(files, filecnt * sizeof(fileinfo_t));
}
if (*filename != '/') {
files[fileidx].path = absolute_path(filename);
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if (files[fileidx].path == NULL) {
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warn("could not get absolute path of file: %s\n", filename);
return;
}
}
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files[fileidx].loaded = false;
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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;
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fileidx++;
}
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void remove_file(int n, bool manual) {
if (n < 0 || n >= filecnt)
return;
if (filecnt == 1) {
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if (!manual)
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fprintf(stderr, "sxiv: no more files to display, aborting\n");
cleanup();
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exit(manual ? EXIT_SUCCESS : EXIT_FAILURE);
}
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if (files[n].path != files[n].name)
free((void*) files[n].path);
free((void*) files[n].name);
if (n + 1 < filecnt)
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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--;
}
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void set_timeout(timeout_f handler, int time, bool overwrite) {
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int i;
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for (i = 0; i < ARRLEN(timeouts); i++) {
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if (timeouts[i].handler == handler) {
if (!timeouts[i].active || overwrite) {
gettimeofday(&timeouts[i].when, 0);
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TV_ADD_MSEC(&timeouts[i].when, time);
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timeouts[i].active = true;
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}
return;
}
}
}
void reset_timeout(timeout_f handler) {
int i;
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for (i = 0; i < ARRLEN(timeouts); i++) {
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if (timeouts[i].handler == handler) {
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timeouts[i].active = false;
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return;
}
}
}
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bool check_timeouts(struct timeval *t) {
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int i = 0, tdiff, tmin = -1;
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struct timeval now;
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while (i < ARRLEN(timeouts)) {
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if (timeouts[i].active) {
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gettimeofday(&now, 0);
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tdiff = TV_DIFF(&timeouts[i].when, &now);
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if (tdiff <= 0) {
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timeouts[i].active = false;
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if (timeouts[i].handler != NULL)
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timeouts[i].handler();
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i = tmin = -1;
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} else if (tmin < 0 || tdiff < tmin) {
tmin = tdiff;
}
}
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i++;
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}
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if (tmin > 0 && t != NULL)
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TV_SET_MSEC(t, tmin);
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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';
}
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void load_image(int new) {
if (new < 0 || new >= filecnt)
return;
win_set_cursor(&win, CURSOR_WATCH);
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img_close(&img, false);
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while (!img_load(&img, &files[new])) {
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remove_file(new, false);
if (new >= filecnt)
new = filecnt - 1;
}
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files[new].loaded = true;
alternate = fileidx;
fileidx = new;
read_info();
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if (img.multi.cnt > 0 && img.multi.animate)
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set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
else
reset_timeout(animate);
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}
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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;
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for (fw = 0, i = filecnt; i > 0; fw++, i /= 10);
sel = mode == MODE_IMAGE ? fileidx : tns.sel;
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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;
}
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} 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));
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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);
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}
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));
}
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}
win_set_bar_info(&win, bar.l, bar.r);
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}
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void redraw(void) {
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if (mode == MODE_IMAGE)
img_render(&img);
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else
tns_render(&tns);
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update_info();
win_draw(&win);
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reset_timeout(redraw);
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reset_cursor();
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}
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void reset_cursor(void) {
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int i;
cursor_t cursor = CURSOR_NONE;
if (mode == MODE_IMAGE) {
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for (i = 0; i < ARRLEN(timeouts); i++) {
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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);
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}
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void animate(void) {
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if (img_frame_animate(&img, false)) {
redraw();
set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
}
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}
void clear_resize(void) {
resized = false;
}
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bool keymask(const keymap_t *k, unsigned int state) {
return (k->ctrl ? ControlMask : 0) == (state & ControlMask);
}
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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;
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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;
}
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for (i = 0; i < ARRLEN(keys); i++) {
if (keys[i].ksym == ksym && keymask(&keys[i], kev->state)) {
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if (keys[i].cmd != NULL && keys[i].cmd(keys[i].arg))
redraw();
prefix = 0;
return;
}
}
}
void on_buttonpress(XButtonEvent *bev) {
int i, sel;
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if (bev == NULL)
return;
if (mode == MODE_IMAGE) {
win_set_cursor(&win, CURSOR_ARROW);
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set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
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for (i = 0; i < ARRLEN(buttons); i++) {
if (buttons[i].button == bev->button &&
buttonmask(&buttons[i], bev->state))
{
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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;
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set_timeout(reset_cursor, TO_CURSOR_HIDE, true);
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load_image(tns.sel);
} else {
tns_highlight(&tns, tns.sel, false);
tns_highlight(&tns, sel, true);
tns.sel = sel;
}
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redraw();
break;
}
break;
case Button4:
case Button5:
if (tns_scroll(&tns, bev->button == Button4 ? DIR_UP : DIR_DOWN,
(bev->state & ControlMask) != 0))
redraw();
break;
}
}
}
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void run(void) {
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int xfd;
fd_set fds;
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struct timeval timeout;
XEvent ev, nextev;
bool discard;
redraw();
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while (true) {
while (mode == MODE_THUMB && tns.cnt < filecnt &&
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XPending(win.env.dpy) == 0)
{
/* load thumbnails */
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set_timeout(redraw, TO_REDRAW_THUMBS, false);
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if (tns_load(&tns, tns.cnt, &files[tns.cnt], false, false)) {
tns.cnt++;
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} else {
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remove_file(tns.cnt, false);
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if (tns.sel >= tns.cnt)
tns.sel--;
}
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if (tns.cnt == filecnt)
redraw();
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else
check_timeouts(NULL);
}
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while (XPending(win.env.dpy) == 0 && check_timeouts(&timeout)) {
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/* wait for timeouts */
xfd = ConnectionNumber(win.env.dpy);
FD_ZERO(&fds);
FD_SET(xfd, &fds);
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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);
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switch (ev.type) {
/* handle events */
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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)) {
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if (mode == MODE_IMAGE) {
img.dirty = true;
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img.checkpan = true;
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} else {
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tns.dirty = true;
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}
if (!resized || win.fullscreen) {
redraw();
set_timeout(clear_resize, TO_REDRAW_RESIZE, false);
resized = true;
} else {
set_timeout(redraw, TO_REDRAW_RESIZE, false);
}
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}
break;
case Expose:
win_expose(&win, &ev.xexpose);
break;
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case KeyPress:
on_keypress(&ev.xkey);
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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) {
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return strcoll(((fileinfo_t*) a)->name, ((fileinfo_t*) b)->name);
}
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int main(int argc, char **argv) {
int i, start;
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size_t n;
ssize_t len;
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char *filename;
const char *homedir;
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struct stat fstats;
r_dir_t dir;
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parse_options(argc, argv);
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if (options->clean_cache) {
tns_init(&tns, 0, NULL);
tns_clean_cache(&tns);
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exit(EXIT_SUCCESS);
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}
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if (options->filecnt == 0) {
print_usage();
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exit(EXIT_FAILURE);
}
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if (options->recursive || options->from_stdin)
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filecnt = FILENAME_CNT;
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else
filecnt = options->filecnt;
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files = (fileinfo_t*) s_malloc(filecnt * sizeof(fileinfo_t));
fileidx = 0;
/* build file list: */
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if (options->from_stdin) {
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filename = NULL;
while ((len = get_line(&filename, &n, stdin)) > 0) {
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if (filename[len-1] == '\n')
filename[len-1] = '\0';
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check_add_file(filename);
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}
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if (filename != NULL)
free(filename);
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} else {
for (i = 0; i < options->filecnt; i++) {
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filename = options->filenames[i];
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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) {
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warn("ignoring directory: %s", filename);
continue;
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}
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if (r_opendir(&dir, filename) < 0) {
warn("could not open directory: %s", filename);
continue;
}
start = fileidx;
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while ((filename = r_readdir(&dir)) != NULL) {
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check_add_file(filename);
free((void*) filename);
}
r_closedir(&dir);
if (fileidx - start > 1)
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qsort(files + start, fileidx - start, sizeof(fileinfo_t), fncmp);
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}
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}
}
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if (fileidx == 0) {
fprintf(stderr, "sxiv: no valid image file given, aborting\n");
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exit(EXIT_FAILURE);
}
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filecnt = fileidx;
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fileidx = options->startnum < filecnt ? options->startnum : 0;
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win_init(&win);
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img_init(&img, &win);
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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;
}
}
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if (options->thumb_mode) {
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mode = MODE_THUMB;
tns_init(&tns, filecnt, &win);
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while (!tns_load(&tns, 0, &files[0], false, false))
remove_file(0, false);
tns.cnt = 1;
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} else {
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mode = MODE_IMAGE;
tns.thumbs = NULL;
load_image(fileidx);
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}
win_open(&win);
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run();
cleanup();
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return 0;
}