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use crate::Bitset;
use glib::translate::*;
use std::marker::PhantomData;
#[derive(Copy, Clone)]
#[doc(alias = "GtkBitsetIter")]
pub struct BitsetIter<'a>(ffi::GtkBitsetIter, PhantomData<&'a Bitset>);
impl<'a> BitsetIter<'a> {
#[doc(alias = "gtk_bitset_iter_init_at")]
pub fn init_at(set: &'a Bitset, target: u32) -> Option<(Self, u32)> {
assert_initialized_main_thread!();
unsafe {
let mut iter = std::mem::MaybeUninit::uninit();
let mut value = std::mem::MaybeUninit::uninit();
let found: bool = from_glib(ffi::gtk_bitset_iter_init_at(
iter.as_mut_ptr(),
set.to_glib_none().0,
target,
value.as_mut_ptr(),
));
if found {
Some((
BitsetIter(iter.assume_init(), PhantomData),
value.assume_init(),
))
} else {
None
}
}
}
#[doc(alias = "gtk_bitset_iter_init_first")]
pub fn init_first(set: &'a Bitset) -> Option<(Self, u32)> {
assert_initialized_main_thread!();
unsafe {
let mut iter = std::mem::MaybeUninit::uninit();
let mut value = std::mem::MaybeUninit::uninit();
let found: bool = from_glib(ffi::gtk_bitset_iter_init_first(
iter.as_mut_ptr(),
set.to_glib_none().0,
value.as_mut_ptr(),
));
if found {
Some((
BitsetIter(iter.assume_init(), PhantomData),
value.assume_init(),
))
} else {
None
}
}
}
#[doc(alias = "gtk_bitset_iter_init_last")]
pub fn init_last(set: &'a Bitset) -> Option<(Self, u32)> {
assert_initialized_main_thread!();
unsafe {
let mut iter = std::mem::MaybeUninit::uninit();
let mut value = std::mem::MaybeUninit::uninit();
let found: bool = from_glib(ffi::gtk_bitset_iter_init_last(
iter.as_mut_ptr(),
set.to_glib_none().0,
value.as_mut_ptr(),
));
if found {
Some((
BitsetIter(iter.assume_init(), PhantomData),
value.assume_init(),
))
} else {
None
}
}
}
#[doc(alias = "gtk_bitset_iter_get_value")]
pub fn value(&self) -> u32 {
unsafe { ffi::gtk_bitset_iter_get_value(self.to_glib_none().0) }
}
#[doc(alias = "gtk_bitset_iter_is_valid")]
pub fn is_valid(&self) -> bool {
unsafe { from_glib(ffi::gtk_bitset_iter_is_valid(self.to_glib_none().0)) }
}
#[doc(alias = "gtk_bitset_iter_previous")]
pub fn previous(&mut self) -> Option<u32> {
unsafe {
let mut value = std::mem::MaybeUninit::uninit();
let found: bool = from_glib(ffi::gtk_bitset_iter_previous(
&mut self.0 as *mut _,
value.as_mut_ptr(),
));
if found {
Some(value.assume_init())
} else {
None
}
}
}
}
impl<'a> Iterator for BitsetIter<'a> {
type Item = u32;
#[doc(alias = "gtk_bitset_iter_next")]
fn next(&mut self) -> Option<Self::Item> {
unsafe {
let mut value = std::mem::MaybeUninit::uninit();
let found: bool = from_glib(ffi::gtk_bitset_iter_next(
&mut self.0 as *mut _,
value.as_mut_ptr(),
));
if found {
Some(value.assume_init())
} else {
None
}
}
}
}
impl<'a> std::iter::FusedIterator for BitsetIter<'a> {}
#[doc(hidden)]
impl<'a> ToGlibPtr<'a, *const ffi::GtkBitsetIter> for BitsetIter<'a> {
type Storage = &'a Self;
#[inline]
fn to_glib_none(&'a self) -> Stash<*const ffi::GtkBitsetIter, Self> {
Stash(&self.0 as *const ffi::GtkBitsetIter, self)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate as gtk4;
#[test]
fn test_bitset_iter() {
let set = Bitset::new_range(0, 20);
let (mut iter, init_value) = BitsetIter::init_first(&set).unwrap();
assert_eq!(init_value, 0);
assert_eq!(iter.next(), Some(1));
assert_eq!(iter.previous(), Some(0));
let set2 = Bitset::new_range(0, 3);
let (mut iter, init_val) = BitsetIter::init_last(&set2).unwrap();
assert_eq!(init_val, 2);
assert_eq!(iter.previous(), Some(1));
assert_eq!(iter.previous(), Some(0));
assert_eq!(iter.previous(), None);
assert!(!iter.is_valid());
assert_eq!(iter.next(), Some(1));
assert!(iter.is_valid());
}
}