gstreamer-rs/gstreamer/src/object.rs

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// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use glib;
use glib::object::{Cast, ObjectExt};
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use glib::signal::SignalHandlerId;
use glib::translate::{from_glib_borrow, from_glib_none, ToGlibPtr};
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use glib::IsA;
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use gobject_sys;
pub trait GstObjectExtManual: 'static {
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fn connect_deep_notify<
'a,
P: Into<Option<&'a str>>,
F: Fn(&Self, &::Object, &glib::ParamSpec) + Send + Sync + 'static,
>(
&self,
name: P,
f: F,
) -> SignalHandlerId;
}
impl<O: IsA<::Object>> GstObjectExtManual for O {
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fn connect_deep_notify<
'a,
P: Into<Option<&'a str>>,
F: Fn(&Self, &::Object, &glib::ParamSpec) + Send + Sync + 'static,
>(
&self,
name: P,
f: F,
) -> SignalHandlerId {
let name = name.into();
let signal_name = if let Some(name) = name {
format!("deep-notify::{}", name)
} else {
"deep-notify".into()
};
let obj: glib::Object =
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unsafe { from_glib_borrow(self.as_ptr() as *mut gobject_sys::GObject) };
obj.connect(signal_name.as_str(), false, move |values| {
let obj: O = unsafe { values[0].get::<::Object>().unwrap().unsafe_cast() };
let prop_obj: ::Object = values[1].get().unwrap();
let pspec = unsafe {
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let pspec = gobject_sys::g_value_get_param(values[2].to_glib_none().0);
from_glib_none(pspec)
};
f(&obj, &prop_obj, &pspec);
None
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})
.unwrap()
}
}
#[cfg(test)]
mod tests {
use super::*;
use prelude::*;
use std::sync::{Arc, Mutex};
#[test]
fn test_deep_notify() {
::init().unwrap();
let bin = ::Bin::new(None);
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let identity = ::ElementFactory::make("identity", Some("id")).unwrap();
bin.add(&identity).unwrap();
let notify = Arc::new(Mutex::new(None));
let notify_clone = notify.clone();
bin.connect_deep_notify(None, move |_, id, prop| {
*notify_clone.lock().unwrap() = Some((id.clone(), String::from(prop.get_name())));
});
identity.set_property("silent", &false).unwrap();
assert_eq!(
*notify.lock().unwrap(),
Some((identity.upcast::<::Object>(), String::from("silent")))
);
}
}