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use crate::Drop;
use glib::object::IsA;
use glib::translate::*;
use glib::GString;
use std::future;
use std::pin::Pin;
use std::ptr;
impl Drop {
#[doc(alias = "gdk_drop_read_async")]
pub fn read_async<Q: FnOnce(Result<(gio::InputStream, GString), glib::Error>) + 'static>(
&self,
mime_types: &[&str],
io_priority: glib::Priority,
cancellable: Option<&impl IsA<gio::Cancellable>>,
callback: Q,
) {
let main_context = glib::MainContext::ref_thread_default();
let is_main_context_owner = main_context.is_owner();
let has_acquired_main_context = (!is_main_context_owner)
.then(|| main_context.acquire().ok())
.flatten();
assert!(
is_main_context_owner || has_acquired_main_context.is_some(),
"Async operations only allowed if the thread is owning the MainContext"
);
let user_data: Box<glib::thread_guard::ThreadGuard<Q>> =
Box::new(glib::thread_guard::ThreadGuard::new(callback));
unsafe extern "C" fn read_async_trampoline<
Q: FnOnce(Result<(gio::InputStream, GString), glib::Error>) + 'static,
>(
_source_object: *mut glib::gobject_ffi::GObject,
res: *mut gio::ffi::GAsyncResult,
user_data: glib::ffi::gpointer,
) {
let mut error = ptr::null_mut();
let mut out_mime_type = ptr::null();
let ret = ffi::gdk_drop_read_finish(
_source_object as *mut _,
res,
&mut out_mime_type,
&mut error,
);
let result = if error.is_null() {
Ok((from_glib_full(ret), from_glib_none(out_mime_type)))
} else {
Err(from_glib_full(error))
};
let callback: Box<glib::thread_guard::ThreadGuard<Q>> =
Box::from_raw(user_data as *mut _);
let callback = callback.into_inner();
callback(result);
}
let callback = read_async_trampoline::<Q>;
unsafe {
ffi::gdk_drop_read_async(
self.to_glib_none().0,
mime_types.to_glib_none().0,
io_priority.into_glib(),
cancellable.map(|p| p.as_ref()).to_glib_none().0,
Some(callback),
Box::into_raw(user_data) as *mut _,
);
}
}
pub fn read_future(
&self,
mime_types: &[&str],
io_priority: glib::Priority,
) -> Pin<
Box<
dyn future::Future<Output = Result<(gio::InputStream, GString), glib::Error>> + 'static,
>,
> {
let mime_types = mime_types
.iter()
.copied()
.map(String::from)
.collect::<Vec<_>>();
Box::pin(gio::GioFuture::new(self, move |obj, cancellable, send| {
let mime_types = mime_types.iter().map(|s| s.as_str()).collect::<Vec<_>>();
obj.read_async(&mime_types, io_priority, Some(cancellable), move |res| {
send.resolve(res);
});
}))
}
}