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

use glib::{
    prelude::*,
    signal::{connect_raw, SignalHandlerId},
    translate::*,
};
use std::{boxed::Box as Box_, fmt, mem::transmute};

glib::wrapper! {
    ///
    ///
    /// ## Signals
    ///
    ///
    /// #### `can-redo-changed`
    ///  Emitted when the ability to redo has changed.
    ///
    /// Action
    ///
    ///
    /// #### `can-undo-changed`
    ///  Emitted when the ability to undo has changed.
    ///
    /// Action
    ///
    /// # Implements
    ///
    /// [`UndoManagerExt`][trait@crate::prelude::UndoManagerExt]
    #[doc(alias = "GtkSourceUndoManager")]
    pub struct UndoManager(Interface<ffi::GtkSourceUndoManager, ffi::GtkSourceUndoManagerIface>);

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

impl UndoManager {
    pub const NONE: Option<&'static UndoManager> = None;
}

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::UndoManager>> Sealed for T {}
}

/// Trait containing all [`struct@UndoManager`] methods.
///
/// # Implementors
///
/// [`UndoManager`][struct@crate::UndoManager]
pub trait UndoManagerExt: IsA<UndoManager> + sealed::Sealed + 'static {
    /// Begin a not undoable action on the buffer. All changes between this call
    /// and the call to [`end_not_undoable_action()`][Self::end_not_undoable_action()] cannot
    /// be undone. This function should be re-entrant.
    #[doc(alias = "gtk_source_undo_manager_begin_not_undoable_action")]
    fn begin_not_undoable_action(&self) {
        unsafe {
            ffi::gtk_source_undo_manager_begin_not_undoable_action(self.as_ref().to_glib_none().0);
        }
    }

    /// Get whether there are redo operations available.
    ///
    /// # Returns
    ///
    /// [`true`] if there are redo operations available, [`false`] otherwise
    #[doc(alias = "gtk_source_undo_manager_can_redo")]
    fn can_redo(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_source_undo_manager_can_redo(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Emits the [`can-redo-changed`][struct@crate::UndoManager#can-redo-changed] signal.
    #[doc(alias = "gtk_source_undo_manager_can_redo_changed")]
    fn can_redo_changed(&self) {
        unsafe {
            ffi::gtk_source_undo_manager_can_redo_changed(self.as_ref().to_glib_none().0);
        }
    }

    /// Get whether there are undo operations available.
    ///
    /// # Returns
    ///
    /// [`true`] if there are undo operations available, [`false`] otherwise
    #[doc(alias = "gtk_source_undo_manager_can_undo")]
    fn can_undo(&self) -> bool {
        unsafe {
            from_glib(ffi::gtk_source_undo_manager_can_undo(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Emits the [`can-undo-changed`][struct@crate::UndoManager#can-undo-changed] signal.
    #[doc(alias = "gtk_source_undo_manager_can_undo_changed")]
    fn can_undo_changed(&self) {
        unsafe {
            ffi::gtk_source_undo_manager_can_undo_changed(self.as_ref().to_glib_none().0);
        }
    }

    /// Ends a not undoable action on the buffer.
    #[doc(alias = "gtk_source_undo_manager_end_not_undoable_action")]
    fn end_not_undoable_action(&self) {
        unsafe {
            ffi::gtk_source_undo_manager_end_not_undoable_action(self.as_ref().to_glib_none().0);
        }
    }

    /// Perform a single redo. Calling this function when there are no redo operations
    /// available is an error. Use [`can_redo()`][Self::can_redo()] to find out
    /// if there are redo operations available.
    #[doc(alias = "gtk_source_undo_manager_redo")]
    fn redo(&self) {
        unsafe {
            ffi::gtk_source_undo_manager_redo(self.as_ref().to_glib_none().0);
        }
    }

    /// Perform a single undo. Calling this function when there are no undo operations
    /// available is an error. Use [`can_undo()`][Self::can_undo()] to find out
    /// if there are undo operations available.
    #[doc(alias = "gtk_source_undo_manager_undo")]
    fn undo(&self) {
        unsafe {
            ffi::gtk_source_undo_manager_undo(self.as_ref().to_glib_none().0);
        }
    }

    /// Emitted when the ability to redo has changed.
    #[doc(alias = "can-redo-changed")]
    fn connect_can_redo_changed<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn can_redo_changed_trampoline<
            P: IsA<UndoManager>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkSourceUndoManager,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(UndoManager::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"can-redo-changed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    can_redo_changed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_can_redo_changed(&self) {
        self.emit_by_name::<()>("can-redo-changed", &[]);
    }

    /// Emitted when the ability to undo has changed.
    #[doc(alias = "can-undo-changed")]
    fn connect_can_undo_changed<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn can_undo_changed_trampoline<
            P: IsA<UndoManager>,
            F: Fn(&P) + 'static,
        >(
            this: *mut ffi::GtkSourceUndoManager,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(UndoManager::from_glib_borrow(this).unsafe_cast_ref())
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"can-undo-changed\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    can_undo_changed_trampoline::<Self, F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    fn emit_can_undo_changed(&self) {
        self.emit_by_name::<()>("can-undo-changed", &[]);
    }
}

impl<O: IsA<UndoManager>> UndoManagerExt for O {}

impl fmt::Display for UndoManager {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("UndoManager")
    }
}