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// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// from webkit-gir-files
// DO NOT EDIT

use crate::{ffi, Value};
use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::boxed::Box as Box_;

glib::wrapper! {
    /// JSCWeakValue represents a weak reference to a value in a #JSCContext. It can be used
    /// to keep a reference to a JavaScript value without protecting it from being garbage
    /// collected and without referencing the #JSCContext either.
    ///
    /// ## Properties
    ///
    ///
    /// #### `value`
    ///  The #JSCValue referencing the JavaScript value.
    ///
    /// Writeable | Construct Only
    ///
    /// ## Signals
    ///
    ///
    /// #### `cleared`
    ///  This signal is emitted when the JavaScript value is destroyed.
    ///
    ///
    #[doc(alias = "JSCWeakValue")]
    pub struct WeakValue(Object<ffi::JSCWeakValue, ffi::JSCWeakValueClass>);

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

impl WeakValue {
    /// Create a new #JSCWeakValue for the JavaScript value referenced by @value.
    /// ## `value`
    /// a #JSCValue
    ///
    /// # Returns
    ///
    /// a new #JSCWeakValue
    #[doc(alias = "jsc_weak_value_new")]
    pub fn new(value: &Value) -> WeakValue {
        skip_assert_initialized!();
        unsafe { from_glib_full(ffi::jsc_weak_value_new(value.to_glib_none().0)) }
    }

    /// Get a #JSCValue referencing the JavaScript value of @self.
    ///
    /// # Returns
    ///
    /// a new #JSCValue or [`None`] if @self was cleared.
    #[doc(alias = "jsc_weak_value_get_value")]
    #[doc(alias = "get_value")]
    pub fn value(&self) -> Option<Value> {
        unsafe { from_glib_full(ffi::jsc_weak_value_get_value(self.to_glib_none().0)) }
    }

    /// This signal is emitted when the JavaScript value is destroyed.
    #[doc(alias = "cleared")]
    pub fn connect_cleared<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn cleared_trampoline<F: Fn(&WeakValue) + 'static>(
            this: *mut ffi::JSCWeakValue,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"cleared\0".as_ptr() as *const _,
                Some(std::mem::transmute::<*const (), unsafe extern "C" fn()>(
                    cleared_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}