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#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fuse3/fuse.h>
#include <xcb/xcb.h>
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_util.h>
struct selection
{
uint32_t len;
char * data;
};
void update_selection(void);
xcb_atom_t get_atom(xcb_connection_t *, const char *);
int clip_getattr(const char *, struct stat *, struct fuse_file_info *);
int clip_readdir(const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *, enum fuse_readdir_flags);
int clip_open(const char *, struct fuse_file_info *);
int clip_read(const char *, char *, size_t, off_t, struct fuse_file_info *);
const uint32_t mask = XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
const uint32_t values[] = {1, XCB_EVENT_MASK_PROPERTY_CHANGE};
const struct fuse_operations clip_ops = {
.getattr = clip_getattr,
.readdir = clip_readdir,
.open = clip_open,
.read = clip_read,
};
static xcb_connection_t * c;
static xcb_screen_t * s;
static xcb_window_t w;
static struct selection x = {.len = 0, .data = NULL};
int main(int argc, char ** argv)
{
c = xcb_connect(NULL, NULL);
s = xcb_setup_roots_iterator(xcb_get_setup(c)).data;
w = xcb_generate_id(c);
xcb_create_window(
c, XCB_COPY_FROM_PARENT, w, s->root, 0, 0, 1, 1, 0, XCB_COPY_FROM_PARENT, s->root_visual, mask, values);
xcb_flush(c);
fuse_main(argc, argv, &clip_ops, NULL);
xcb_disconnect(c);
}
void update_selection(void)
{
xcb_atom_t TARGET_PROPERTY = get_atom(c, "_TARGET_SELECTION");
xcb_atom_t UTF8_STRING = get_atom(c, "UTF8_STRING"); // TODO: Actually, focus on "rawest" format at first.
// TODO-maybe: Look for the selection owner first?
xcb_convert_selection(c, w, XCB_ATOM_PRIMARY, UTF8_STRING, TARGET_PROPERTY, XCB_CURRENT_TIME);
xcb_flush(c);
xcb_generic_event_t * e;
int done = 0; // TODO: Look into continuous notifications and keeping the data somewhere?
while (!done)
{
e = xcb_wait_for_event(c);
if (NULL == e) return;
if (XCB_SELECTION_NOTIFY != XCB_EVENT_RESPONSE_TYPE(e))
{
free(e);
continue;
}
xcb_selection_notify_event_t * n = (xcb_selection_notify_event_t *) e;
if (XCB_ATOM_PRIMARY == n->selection && XCB_NONE != n->property)
{
xcb_icccm_get_text_property_reply_t prop;
xcb_get_property_cookie_t cookie = xcb_icccm_get_text_property(c, n->requestor, n->property);
if (xcb_icccm_get_text_property_reply(c, cookie, &prop, NULL))
{
x.data = realloc(x.data, prop.name_len);
if (NULL == x.data)
x.len = 0;
x.len = prop.name_len;
memcpy(x.data, prop.name, prop.name_len);
xcb_icccm_get_text_property_reply_wipe(&prop);
xcb_delete_property(c, n->requestor, n->property);
done = 1;
}
}
free(e);
}
}
xcb_atom_t get_atom(xcb_connection_t * c, const char * name)
{
xcb_intern_atom_cookie_t cookie = xcb_intern_atom(c, 0, strlen(name), name);
xcb_intern_atom_reply_t * reply = xcb_intern_atom_reply(c, cookie, NULL);
xcb_atom_t atom = reply->atom;
free(reply);
return atom;
}
int clip_getattr(const char * path, struct stat * st, struct fuse_file_info * fi)
{
(void) fi;
update_selection(); // TODO: The content is updated way too often.
memset(st, 0, sizeof(struct stat));
if (0 == strcmp(path, "/"))
{
st->st_mode = S_IFDIR | 0755;
st->st_nlink = 2;
}
else if (0 == strcmp(path + 1, "primary"))
{
st->st_mode = S_IFREG | 0444;
st->st_nlink = 1;
st->st_size = x.len;
}
else
return -ENOENT;
return 0;
}
int clip_readdir(
const char * path, void * buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info * fi,
enum fuse_readdir_flags flags)
{
(void) offset;
(void) fi;
(void) flags;
if (0 != strcmp(path, "/"))
return -ENOENT;
filler(buf, ".", NULL, 0, 0);
filler(buf, "..", NULL, 0, 0);
filler(buf, "primary", NULL, 0, 0);
return 0;
}
int clip_open(const char * path, struct fuse_file_info * fi)
{
if (0 != strcmp(path + 1, "primary"))
return -ENOENT;
if (O_RDONLY != (fi->flags & O_ACCMODE))
return -EACCES;
return 0; // TODO: Maybe queue selection content retrieval here?
}
int clip_read(const char * path, char * buf, size_t size, off_t offset, struct fuse_file_info * fi)
{
(void) fi;
if (0 != strcmp(path + 1, "primary"))
return -ENOENT;
update_selection(); // TODO: The content is updated way too often.
if (offset < x.len)
{
if (offset + size > x.len)
size = x.len - offset;
memcpy(buf, x.data + offset, size);
}
else
size = 0;
return size;
}
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