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// Take a look at the license at the top of the repository in the LICENSE file.

use crate::WaylandMonitor;
#[cfg(any(feature = "wayland_crate", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "wayland_crate")))]
use {gdk::prelude::*, glib::translate::ToGlibPtr};

#[cfg(any(feature = "wayland_crate", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "wayland_crate")))]
use wayland_client::{backend::ObjectId, protocol::wl_output::WlOutput, Proxy};

impl WaylandMonitor {
    /// Returns the Wayland `wl_output` of a [`gdk::Monitor`][crate::gdk::Monitor].
    ///
    /// # Returns
    ///
    /// a Wayland `wl_output`
    #[doc(alias = "gdk_wayland_monitor_get_wl_output")]
    #[doc(alias = "get_wl_output")]
    #[cfg(any(feature = "wayland_crate", feature = "dox"))]
    #[cfg_attr(feature = "dox", doc(cfg(feature = "wayland_crate")))]
    pub fn wl_output(&self) -> Option<WlOutput> {
        let display = self.display().downcast::<crate::WaylandDisplay>().unwrap();
        unsafe {
            let output_ptr = ffi::gdk_wayland_monitor_get_wl_output(self.to_glib_none().0);
            if output_ptr.is_null() {
                None
            } else {
                let cnx = display.connection();
                let id = ObjectId::from_ptr(WlOutput::interface(), output_ptr as *mut _).unwrap();

                WlOutput::from_id(&cnx, id).ok()
            }
        }
    }
}