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

use std::mem::transmute;

use glib::{
    signal::{SignalHandlerId, connect_raw},
    translate::*,
};

use crate::{ShortcutsSection, ffi, prelude::*};

impl ShortcutsSection {
    // todo: figure out what the bool return value here corresponds to
    pub fn connect_change_current_page<F: Fn(&ShortcutsSection, i32) -> bool + 'static>(
        &self,
        f: F,
    ) -> SignalHandlerId {
        unsafe {
            unsafe extern "C" fn change_current_page_trampoline<
                F: Fn(&ShortcutsSection, i32) -> bool + 'static,
            >(
                this: *mut ffi::GtkShortcutsSection,
                object: libc::c_int,
                f: glib::ffi::gpointer,
            ) -> glib::ffi::gboolean {
                unsafe {
                    let f: &F = &*(f as *const F);
                    f(&from_glib_borrow(this), object).into_glib()
                }
            }
            let f = Box::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                c"change-current-page".as_ptr() as *const _,
                Some(transmute::<usize, unsafe extern "C" fn()>(
                    change_current_page_trampoline::<F> as usize,
                )),
                Box::into_raw(f),
            )
        }
    }

    pub fn emit_change_current_page(&self, object: i32) -> bool {
        self.emit_by_name("change-current-page", &[&object])
    }
}
