// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// from gst-gir-files (https://gitlab.freedesktop.org/gstreamer/gir-files-rs.git)
// DO NOT EDIT

use glib::object::Cast;
use glib::object::IsA;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use std::boxed::Box as Box_;
use std::mem::transmute;

glib::wrapper! {
    /// This interface abstracts handling of property sets for elements with
    /// children. Imagine elements such as mixers or polyphonic generators. They all
    /// have multiple [`crate::Pad`] or some kind of voice objects. Another use case are
    /// container elements like [`crate::Bin`].
    /// The element implementing the interface acts as a parent for those child
    /// objects.
    ///
    /// By implementing this interface the child properties can be accessed from the
    /// parent element by using [`Self::get()`] and [`Self::set()`].
    ///
    /// Property names are written as "child-name::property-name". The whole naming
    /// scheme is recursive. Thus "child1::child2::property" is valid too, if
    /// "child1" and "child2" implement the [`crate::ChildProxy`] interface.
    ///
    /// # Implements
    ///
    /// [`trait@crate::prelude::ChildProxyExt`], [`trait@crate::prelude::ChildProxyExtManual`]
    pub struct ChildProxy(Interface<ffi::GstChildProxy, ffi::GstChildProxyInterface>);

    match fn {
        type_ => || ffi::gst_child_proxy_get_type(),
    }
}

unsafe impl Send for ChildProxy {}
unsafe impl Sync for ChildProxy {}

pub const NONE_CHILD_PROXY: Option<&ChildProxy> = None;

/// Trait containing all `ChildProxy` methods.
///
/// # Implementors
///
/// [`struct@crate::Bin`], [`struct@crate::ChildProxy`], [`struct@crate::Pipeline`]
pub trait ChildProxyExt: 'static {
    /// Emits the "child-added" signal.
    /// ## `child`
    /// the newly added child
    /// ## `name`
    /// the name of the new child
    #[doc(alias = "gst_child_proxy_child_added")]
    fn child_added<P: IsA<glib::Object>>(&self, child: &P, name: &str);

    /// Emits the "child-removed" signal.
    /// ## `child`
    /// the removed child
    /// ## `name`
    /// the name of the old child
    #[doc(alias = "gst_child_proxy_child_removed")]
    fn child_removed<P: IsA<glib::Object>>(&self, child: &P, name: &str);

    //#[doc(alias = "gst_child_proxy_get")]
    //fn get(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);

    /// Fetches a child by its number.
    /// ## `index`
    /// the child's position in the child list
    ///
    /// # Returns
    ///
    /// the child object or [`None`] if
    ///  not found (index too high). Unref after usage.
    ///
    /// MT safe.
    #[doc(alias = "gst_child_proxy_get_child_by_index")]
    #[doc(alias = "get_child_by_index")]
    fn child_by_index(&self, index: u32) -> Option<glib::Object>;

    /// Looks up a child element by the given name.
    ///
    /// This virtual method has a default implementation that uses [`crate::Object`]
    /// together with [`crate::prelude::GstObjectExt::get_name()`]. If the interface is to be used with
    /// `GObjects`, this methods needs to be overridden.
    /// ## `name`
    /// the child's name
    ///
    /// # Returns
    ///
    /// the child object or [`None`] if
    ///  not found. Unref after usage.
    ///
    /// MT safe.
    #[doc(alias = "gst_child_proxy_get_child_by_name")]
    #[doc(alias = "get_child_by_name")]
    fn child_by_name(&self, name: &str) -> Option<glib::Object>;

    /// Gets the number of child objects this parent contains.
    ///
    /// # Returns
    ///
    /// the number of child objects
    ///
    /// MT safe.
    #[doc(alias = "gst_child_proxy_get_children_count")]
    #[doc(alias = "get_children_count")]
    fn children_count(&self) -> u32;

    //#[doc(alias = "gst_child_proxy_get_valist")]
    //#[doc(alias = "get_valist")]
    //fn valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);

    //#[doc(alias = "gst_child_proxy_lookup")]
    //fn lookup(&self, name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<glib::Object>;

    //#[doc(alias = "gst_child_proxy_set")]
    //fn set(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs);

    //#[doc(alias = "gst_child_proxy_set_valist")]
    //fn set_valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported);

    /// Will be emitted after the `object` was added to the `child_proxy`.
    /// ## `object`
    /// the [`crate::glib::object::Object`] that was added
    /// ## `name`
    /// the name of the new child
    #[doc(alias = "child-added")]
    fn connect_child_added<F: Fn(&Self, &glib::Object, &str) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;

    /// Will be emitted after the `object` was removed from the `child_proxy`.
    /// ## `object`
    /// the [`crate::glib::object::Object`] that was removed
    /// ## `name`
    /// the name of the old child
    #[doc(alias = "child-removed")]
    fn connect_child_removed<F: Fn(&Self, &glib::Object, &str) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId;
}

impl<O: IsA<ChildProxy>> ChildProxyExt for O {
    fn child_added<P: IsA<glib::Object>>(&self, child: &P, name: &str) {
        unsafe {
            ffi::gst_child_proxy_child_added(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                name.to_glib_none().0,
            );
        }
    }

    fn child_removed<P: IsA<glib::Object>>(&self, child: &P, name: &str) {
        unsafe {
            ffi::gst_child_proxy_child_removed(
                self.as_ref().to_glib_none().0,
                child.as_ref().to_glib_none().0,
                name.to_glib_none().0,
            );
        }
    }

    //fn get(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
    //    unsafe { TODO: call ffi:gst_child_proxy_get() }
    //}

    fn child_by_index(&self, index: u32) -> Option<glib::Object> {
        unsafe {
            from_glib_full(ffi::gst_child_proxy_get_child_by_index(
                self.as_ref().to_glib_none().0,
                index,
            ))
        }
    }

    fn child_by_name(&self, name: &str) -> Option<glib::Object> {
        unsafe {
            from_glib_full(ffi::gst_child_proxy_get_child_by_name(
                self.as_ref().to_glib_none().0,
                name.to_glib_none().0,
            ))
        }
    }

    fn children_count(&self) -> u32 {
        unsafe { ffi::gst_child_proxy_get_children_count(self.as_ref().to_glib_none().0) }
    }

    //fn valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
    //    unsafe { TODO: call ffi:gst_child_proxy_get_valist() }
    //}

    //fn lookup(&self, name: &str, pspec: /*Ignored*/glib::ParamSpec) -> Option<glib::Object> {
    //    unsafe { TODO: call ffi:gst_child_proxy_lookup() }
    //}

    //fn set(&self, first_property_name: &str, : /*Unknown conversion*//*Unimplemented*/Fundamental: VarArgs) {
    //    unsafe { TODO: call ffi:gst_child_proxy_set() }
    //}

    //fn set_valist(&self, first_property_name: &str, var_args: /*Unknown conversion*//*Unimplemented*/Unsupported) {
    //    unsafe { TODO: call ffi:gst_child_proxy_set_valist() }
    //}

    #[doc(alias = "child-added")]
    fn connect_child_added<F: Fn(&Self, &glib::Object, &str) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn child_added_trampoline<
            P,
            F: Fn(&P, &glib::Object, &str) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstChildProxy,
            object: *mut glib::gobject_ffi::GObject,
            name: *mut libc::c_char,
            f: glib::ffi::gpointer,
        ) where
            P: IsA<ChildProxy>,
        {
            let f: &F = &*(f as *const F);
            f(
                &ChildProxy::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(object),
                &glib::GString::from_glib_borrow(name),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"child-added\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    child_added_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "child-removed")]
    fn connect_child_removed<F: Fn(&Self, &glib::Object, &str) + Send + Sync + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe extern "C" fn child_removed_trampoline<
            P,
            F: Fn(&P, &glib::Object, &str) + Send + Sync + 'static,
        >(
            this: *mut ffi::GstChildProxy,
            object: *mut glib::gobject_ffi::GObject,
            name: *mut libc::c_char,
            f: glib::ffi::gpointer,
        ) where
            P: IsA<ChildProxy>,
        {
            let f: &F = &*(f as *const F);
            f(
                &ChildProxy::from_glib_borrow(this).unsafe_cast_ref(),
                &from_glib_borrow(object),
                &glib::GString::from_glib_borrow(name),
            )
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"child-removed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    child_removed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}