Merge branch 'autoreload'

Pull request #278.

Fixes issue #29 and issue #199.
This commit is contained in:
Bert Münnich 2017-05-17 20:22:23 +02:00
commit caec32d257
5 changed files with 219 additions and 3 deletions

View file

@ -21,9 +21,13 @@ ifndef NO_LIBEXIF
LIBS += -lexif
endif
# select autoreload backend
# overwritten with `make AUTORELOAD=nop`
AUTORELOAD := inotify
.PHONY: clean install uninstall
SRC := commands.c image.c main.c options.c thumbs.c util.c window.c
SRC := autoreload_$(AUTORELOAD).c commands.c image.c main.c options.c thumbs.c util.c window.c
DEP := $(SRC:.c=.d)
OBJ := $(SRC:.c=.o)

36
autoreload.h Normal file
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@ -0,0 +1,36 @@
/* Copyright 2017 Max Voit
*
* This file is part of sxiv.
*
* 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.
*
* 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/>.
*/
#ifndef AUTORELOAD_H
#define AUTORELOAD_H
#include "types.h"
typedef struct {
int fd;
int wd_dir;
int wd_file;
char *filename;
} arl_t;
void arl_init(arl_t*);
void arl_cleanup(arl_t*);
void arl_setup(arl_t*, const char* /* result of realpath(3) */);
bool arl_handle(arl_t*);
#endif /* AUTORELOAD_H */

113
autoreload_inotify.c Normal file
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@ -0,0 +1,113 @@
/* Copyright 2017 Max Voit
*
* This file is part of sxiv.
*
* 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.
*
* 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/>.
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/inotify.h>
#include "util.h"
#include "autoreload.h"
void arl_init(arl_t *arl)
{
arl->fd = inotify_init1(IN_CLOEXEC | IN_NONBLOCK);
arl->wd_dir = arl->wd_file = -1;
if (arl->fd == -1)
error(0, 0, "Could not initialize inotify, no automatic image reloading");
}
CLEANUP void arl_cleanup(arl_t *arl)
{
if (arl->fd != -1)
close(arl->fd);
free(arl->filename);
}
static void rm_watch(int fd, int *wd)
{
if (*wd != -1) {
inotify_rm_watch(fd, *wd);
*wd = -1;
}
}
static void add_watch(int fd, int *wd, const char *path, uint32_t mask)
{
*wd = inotify_add_watch(fd, path, mask);
if (*wd == -1)
error(0, errno, "inotify: %s", path);
}
void arl_setup(arl_t *arl, const char *filepath)
{
char *base = strrchr(filepath, '/');
if (arl->fd == -1)
return;
rm_watch(arl->fd, &arl->wd_dir);
rm_watch(arl->fd, &arl->wd_file);
add_watch(arl->fd, &arl->wd_file, filepath, IN_CLOSE_WRITE | IN_DELETE_SELF);
free(arl->filename);
arl->filename = estrdup(filepath);
if (base != NULL) {
arl->filename[++base - filepath] = '\0';
add_watch(arl->fd, &arl->wd_dir, arl->filename, IN_CREATE | IN_MOVED_TO);
strcpy(arl->filename, base);
}
}
union {
char d[4096]; /* aligned buffer */
struct inotify_event e;
} buf;
bool arl_handle(arl_t *arl)
{
bool reload = false;
char *ptr;
const struct inotify_event *event;
for (;;) {
ssize_t len = read(arl->fd, buf.d, sizeof(buf.d));
if (len == -1) {
if (errno == EINTR)
continue;
break;
}
for (ptr = buf.d; ptr < buf.d + len; ptr += sizeof(*event) + event->len) {
event = (const struct inotify_event*) ptr;
if (event->mask & IN_CLOSE_WRITE) {
reload = true;
} else if (event->mask & IN_DELETE_SELF) {
rm_watch(arl->fd, &arl->wd_file);
} else if (event->mask & (IN_CREATE | IN_MOVED_TO)) {
if (STREQ(event->name, arl->filename))
reload = true;
}
}
}
return reload;
}

43
autoreload_nop.c Normal file
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@ -0,0 +1,43 @@
/* Copyright 2017 Max Voit
*
* This file is part of sxiv.
*
* 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.
*
* 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/>.
*/
#include "autoreload.h"
void arl_cleanup(arl_t *arl)
{
(void) arl;
}
bool arl_handle(arl_t *arl, const char *filepath)
{
(void) arl;
(void) filepath;
return false;
}
void arl_init(arl_t *arl)
{
(void) arl;
}
void arl_setup(arl_t *arl, const char *filepath)
{
(void) arl;
(void) filepath;
}

24
main.c
View file

@ -28,6 +28,7 @@
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.h>
#include <X11/keysym.h>
#include <X11/XF86keysym.h>
@ -38,6 +39,7 @@
#include "thumbs.h"
#include "util.h"
#include "window.h"
#include "autoreload.h"
#define _MAPPINGS_CONFIG
#include "config.h"
@ -56,6 +58,7 @@ void slideshow(void);
void clear_resize(void);
appmode_t mode;
arl_t arl;
img_t img;
tns_t tns;
win_t win;
@ -98,6 +101,7 @@ timeout_t timeouts[] = {
void cleanup(void)
{
img_close(&img, false);
arl_cleanup(&arl);
tns_free(&tns);
win_close(&win);
}
@ -317,6 +321,7 @@ void load_image(int new)
info.open = false;
open_info();
arl_setup(&arl, files[fileidx].path);
if (img.multi.cnt > 0 && img.multi.animate)
set_timeout(animate, img.multi.frames[img.multi.sel].delay, true);
@ -672,6 +677,8 @@ void on_buttonpress(XButtonEvent *bev)
prefix = 0;
}
const struct timespec ten_ms = {0, 10000000};
void run(void)
{
int xfd;
@ -685,8 +692,8 @@ void run(void)
init_thumb = mode == MODE_THUMB && tns.initnext < filecnt;
load_thumb = mode == MODE_THUMB && tns.loadnext < tns.end;
if ((init_thumb || load_thumb || to_set || info.fd != -1) &&
XPending(win.env.dpy) == 0)
if ((init_thumb || load_thumb || to_set || info.fd != -1 ||
arl.fd != -1) && XPending(win.env.dpy) == 0)
{
if (load_thumb) {
set_timeout(redraw, TO_REDRAW_THUMBS, false);
@ -708,9 +715,21 @@ void run(void)
FD_SET(info.fd, &fds);
xfd = MAX(xfd, info.fd);
}
if (arl.fd != -1) {
FD_SET(arl.fd, &fds);
xfd = MAX(xfd, arl.fd);
}
select(xfd + 1, &fds, 0, 0, to_set ? &timeout : NULL);
if (info.fd != -1 && FD_ISSET(info.fd, &fds))
read_info();
if (arl.fd != -1 && FD_ISSET(arl.fd, &fds)) {
if (arl_handle(&arl)) {
/* when too fast, imlib2 can't load the image */
nanosleep(&ten_ms, NULL);
load_image(fileidx);
redraw();
}
}
}
continue;
}
@ -854,6 +873,7 @@ int main(int argc, char **argv)
win_init(&win);
img_init(&img, &win);
arl_init(&arl);
if ((homedir = getenv("XDG_CONFIG_HOME")) == NULL || homedir[0] == '\0') {
homedir = getenv("HOME");