#![feature(step_trait)]
#![feature(type_alias_impl_trait)]
#![feature(impl_trait_in_assoc_type)]
#![feature(const_precise_live_drops)]
#![feature(type_changing_struct_update)]
#![feature(anonymous_lifetime_in_impl_trait)]
//#![feature(non_lifetime_binders)]

pub(crate) use self::Direction::*;
pub(crate) use std::fmt::{Debug, Display};
pub(crate) use std::marker::PhantomData;
pub(crate) use std::ops::{Add, Sub, Mul, Div};
pub(crate) use std::sync::{Arc, RwLock, atomic::{AtomicUsize, Ordering::Relaxed}};
pub(crate) use tengri_core::*;

/// Drawing target.
pub trait Out: Send + Sync + Sized {
    /// Unit of length
    type Unit: Coordinate;

    /// Rectangle without offset
    type Size: Size<Self::Unit>;

    /// Rectangle with offset
    type Area: Area<Self::Unit>;

    /// Render drawable in area specified by `T::layout(self.area())`
    #[inline] fn place <'t, T: Draw<Self> + Layout<Self> + ?Sized> (
        &mut self, content: &'t T
    ) {
        self.place_at(content.layout(self.area()), content)
    }

    /// Render drawable in area specified by `area`
    fn place_at <'t, T: Draw<Self> + ?Sized> (&mut self, area: Self::Area, content: &'t T);

    /// Current output area
    fn area (&self) -> Self::Area;
    #[inline] fn x (&self) -> Self::Unit { self.area().x() }
    #[inline] fn y (&self) -> Self::Unit { self.area().y() }
    #[inline] fn w (&self) -> Self::Unit { self.area().w() }
    #[inline] fn h (&self) -> Self::Unit { self.area().h() }
    #[inline] fn wh (&self) -> Self::Size { self.area().wh().into() }

    /// Mutable pointer to area.
    fn area_mut (&mut self) -> &mut Self::Area;
}

#[cfg(test)] mod output_test;
#[cfg(test)] pub(crate) use proptest_derive::Arbitrary;

mod content; pub use self::content::*;
mod draw;    pub use self::draw::*;
mod group;   pub use self::group::*;
mod layout;  pub use self::layout::*;
mod space;   pub use self::space::*;
mod thunk;   pub use self::thunk::*;
mod widget;  pub use self::widget::*;

#[cfg(feature = "dsl")] mod view;
#[cfg(feature = "dsl")] pub use self::view::*;