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output: remodularize

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🪞👃🪞 2025-09-02 22:36:34 +03:00
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output/src/layout_xy.rs Normal file
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//! Transform:
//! ```
//! use ::tengri::{output::*, tui::*};
//! let area: [u16;4] = [10, 10, 20, 20];
//! fn test (area: [u16;4], item: &impl Content<TuiOut>, expected: [u16;4]) {
//! assert_eq!(Content::layout(item, area), expected);
//! assert_eq!(Render::layout(item, area), expected);
//! };
//! test(area, &(), [20, 20, 0, 0]);
//!
//! test(area, &Fill::xy(()), area);
//! test(area, &Fill::x(()), [10, 20, 20, 0]);
//! test(area, &Fill::y(()), [20, 10, 0, 20]);
//!
//! //FIXME:test(area, &Fixed::x(4, ()), [18, 20, 4, 0]);
//! //FIXME:test(area, &Fixed::y(4, ()), [20, 18, 0, 4]);
//! //FIXME:test(area, &Fixed::xy(4, 4, unit), [18, 18, 4, 4]);
//! ```
use crate::*;
/// Defines an enum that transforms its content
/// along either the X axis, the Y axis, or both.
macro_rules! transform_xy {
($x:literal $y:literal $xy:literal |$self:ident : $Enum:ident, $to:ident|$area:expr) => {
pub enum $Enum<A> { X(A), Y(A), XY(A) }
impl<A> $Enum<A> {
#[inline] pub const fn x (item: A) -> Self { Self::X(item) }
#[inline] pub const fn y (item: A) -> Self { Self::Y(item) }
#[inline] pub const fn xy (item: A) -> Self { Self::XY(item) }
}
impl<E: Output, T: Content<E>> Content<E> for $Enum<T> {
fn content (&self) -> impl Render<E> + '_ {
match self {
Self::X(item) => item,
Self::Y(item) => item,
Self::XY(item) => item,
}
}
fn layout (&$self, $to: <E as Output>::Area) -> <E as Output>::Area {
use $Enum::*;
$area
}
}
}
}
/// Defines an enum that parametrically transforms its content
/// along either the X axis, the Y axis, or both.
macro_rules! transform_xy_unit {
($x:literal $y:literal $xy:literal |$self:ident : $Enum:ident, $to:ident|$layout:expr) => {
pub enum $Enum<U, A> { X(U, A), Y(U, A), XY(U, U, A), }
impl<U, A> $Enum<U, A> {
#[inline] pub const fn x (x: U, item: A) -> Self { Self::X(x, item) }
#[inline] pub const fn y (y: U, item: A) -> Self { Self::Y(y, item) }
#[inline] pub const fn xy (x: U, y: U, item: A) -> Self { Self::XY(x, y, item) }
}
impl<E: Output, T: Content<E>> Content<E> for $Enum<E::Unit, T> {
fn layout (&$self, $to: E::Area) -> E::Area {
$layout.into()
}
fn content (&self) -> impl Render<E> + '_ {
use $Enum::*;
Some(match self { X(_, c) => c, Y(_, c) => c, XY(_, _, c) => c, })
}
}
impl<U: Coordinate, T> $Enum<U, T> {
#[inline] pub fn dx (&self) -> U {
use $Enum::*;
match self { X(x, _) => *x, Y(_, _) => 0.into(), XY(x, _, _) => *x, }
}
#[inline] pub fn dy (&self) -> U {
use $Enum::*;
match self { X(_, _) => 0.into(), Y(y, _) => *y, XY(_, y, _) => *y, }
}
}
}
}
transform_xy!("fill/x" "fill/y" "fill/xy" |self: Fill, to|{
let [x0, y0, wmax, hmax] = to.xywh();
let [x, y, w, h] = self.content().layout(to).xywh();
match self {
X(_) => [x0, y, wmax, h],
Y(_) => [x, y0, w, hmax],
XY(_) => [x0, y0, wmax, hmax],
}.into()
});
transform_xy_unit!("fixed/x" "fixed/y" "fixed/xy"|self: Fixed, area|{
let [x, y, w, h] = area.xywh();
let fixed_area = match self {
Self::X(fw, _) => [x, y, *fw, h],
Self::Y(fh, _) => [x, y, w, *fh],
Self::XY(fw, fh, _) => [x, y, *fw, *fh],
};
let [x, y, w, h] = Render::layout(&self.content(), fixed_area.into()).xywh();
let fixed_area = match self {
Self::X(fw, _) => [x, y, *fw, h],
Self::Y(fh, _) => [x, y, w, *fh],
Self::XY(fw, fh, _) => [x, y, *fw, *fh],
};
fixed_area
});
transform_xy_unit!("min/x" "min/y" "min/xy"|self: Min, area|{
let area = Render::layout(&self.content(), area);
match self {
Self::X(mw, _) => [area.x(), area.y(), area.w().max(*mw), area.h()],
Self::Y(mh, _) => [area.x(), area.y(), area.w(), area.h().max(*mh)],
Self::XY(mw, mh, _) => [area.x(), area.y(), area.w().max(*mw), area.h().max(*mh)],
}
});
transform_xy_unit!("max/x" "max/y" "max/xy"|self: Max, area|{
let [x, y, w, h] = area.xywh();
Render::layout(&self.content(), match self {
Self::X(fw, _) => [x, y, *fw, h],
Self::Y(fh, _) => [x, y, w, *fh],
Self::XY(fw, fh, _) => [x, y, *fw, *fh],
}.into())
});
transform_xy_unit!("shrink/x" "shrink/y" "shrink/xy"|self: Shrink, area|Render::layout(
&self.content(),
[area.x(), area.y(), area.w().minus(self.dx()), area.h().minus(self.dy())].into()));
transform_xy_unit!("expand/x" "expand/y" "expand/xy"|self: Expand, area|Render::layout(
&self.content(),
[area.x(), area.y(), area.w().plus(self.dx()), area.h().plus(self.dy())].into()));
transform_xy_unit!("push/x" "push/y" "push/xy"|self: Push, area|{
let area = Render::layout(&self.content(), area);
[area.x().plus(self.dx()), area.y().plus(self.dy()), area.w(), area.h()]
});
transform_xy_unit!("pull/x" "pull/y" "pull/xy"|self: Pull, area|{
let area = Render::layout(&self.content(), area);
[area.x().minus(self.dx()), area.y().minus(self.dy()), area.w(), area.h()]
});
transform_xy_unit!("margin/x" "margin/y" "margin/xy"|self: Margin, area|{
let area = Render::layout(&self.content(), area);
let dx = self.dx();
let dy = self.dy();
[area.x().minus(dx), area.y().minus(dy), area.w().plus(dy.plus(dy)), area.h().plus(dy.plus(dy))]
});
transform_xy_unit!("padding/x" "padding/y" "padding/xy"|self: Padding, area|{
let area = Render::layout(&self.content(), area);
let dx = self.dx();
let dy = self.dy();
[area.x().plus(dx), area.y().plus(dy), area.w().minus(dy.plus(dy)), area.h().minus(dy.plus(dy))]
});