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moar flat
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facile pop culture reference
parent
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commit
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29 changed files with 649 additions and 582 deletions
315
src/layout/split.rs
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315
src/layout/split.rs
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use super::*;
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/// Split along an axis. Direction determines order.
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#[cfg_attr(test, derive(Arbitrary))]
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#[derive(Copy, Clone, PartialEq, Debug, Default)] pub enum Split {
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North,
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South,
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East,
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West,
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Above,
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#[default] Below
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}
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pub struct Pair<S: Screen, A: Draw<S>, B: Draw<S>>(Split, A, B, PhantomData<S>);
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pub fn split <S: Screen, A: Draw<S>, B: Draw<S>> (
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split: Split, a: A, b: B
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) -> Pair<S, A, B> {
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Pair(split, a, b, PhantomData)
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}
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impl<S: Screen, A: Draw<S>, B: Draw<S>> Draw<S> for Pair<S, A, B> {
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fn layout (&self, to: XYWH<S::Unit>) -> Drawn<S::Unit> {
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let Self(split, a, b, ..) = self;
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let (area_a, area_b) = stack_areas(split, to, a, b)?;
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Ok(stack_drawn(split, area_a, area_b))
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}
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fn draw (self, to: &mut S) -> Drawn<S::Unit> {
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let Self(ref split, a, b, ..) = self;
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let (area_a, area_b) = stack_areas(split, to.area(), &a, &b)?;
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let (drawn_a, drawn_b) = draw_stacks(split, to, a, area_a, None, b, area_b, None)?;
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Ok(stack_drawn(split, drawn_a, drawn_b))
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}
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}
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impl Split {
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/// ```
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/// use tengri::*;
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/// let _ = Split::Above.stack("", "");
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/// let _ = Split::Below.stack("", "");
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/// let _ = Split::North.stack("", "");
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/// let _ = Split::South.stack("", "");
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/// let _ = Split::East.stack("", "");
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/// let _ = Split::West.stack("", "");
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/// ```
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pub const fn stack <S: Screen, A: Draw<S>, B: Draw<S>> (&self, a: A, b: B) -> impl Draw<S> {
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Pair(*self, a, b, PhantomData)
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}
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/// ```
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/// use tengri::*;
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/// let _ = Split::Above.half("", "");
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/// let _ = Split::Below.half("", "");
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/// let _ = Split::North.half("", "");
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/// let _ = Split::South.half("", "");
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/// let _ = Split::East.half("", "");
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/// let _ = Split::West.half("", "");
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/// ```
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pub const fn half <S: Screen, A: Draw<S>, B: Draw<S>> (&self, a: A, b: B) -> impl Draw<S> {
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draw(move|to: &mut S|{
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let (area_a, area_b) = to.xywh().split_half(self);
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let (origin_a, origin_b) = self.origins();
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let (drawn_a, drawn_b) = draw_stacks(self, to, a, area_a, origin_a, b, area_b, origin_b)?;
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Ok(stack_drawn(self, drawn_a, drawn_b))
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})
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}
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/// Newly split areas begin at the center of the split
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/// to maintain centeredness in the user's field of view.
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///
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/// Use [align] to override that and always start
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/// at the top, bottom, etc.
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///
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/// ```
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/// /*
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///
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/// Split east: Split south:
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/// | | | | A |
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/// | <-A|B-> | |---------|
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/// | | | | B |
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///
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/// */
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/// ```
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const fn origins (&self) -> (Azimuth, Azimuth) {
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use Azimuth::*;
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match self {
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Self::South => (S, N),
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Self::East => (E, W),
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Self::North => (N, S),
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Self::West => (W, E),
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Self::Above => (C, C),
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Self::Below => (C, C),
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}
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}
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///// ```
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///// use tengri::*;
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///// let _ = Split::Below.iter([
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///// "Leftbar"
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///// .min_w(10).max_w(15).align(Azimuth::NW),
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///// "Rightbar"
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///// .min_w(10).max_w(12).align(Azimuth::NE),
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///// "Center"
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///// .min_w(20).max_w(40).align(Azimuth::C),
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///// ].iter());
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///// ```
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//pub fn iter <S: Screen, T: Draw<S>> (&self, _: impl Iterator<Item = T>) {
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//todo!()
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//}
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}
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fn draw_stacks <S: Screen> (
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split: &Split,
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to: &mut S,
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a: impl Draw<S>,
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area_a: impl Into<Option<XYWH<S::Unit>>>,
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origin_a: impl Into<Option<Azimuth>>,
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b: impl Draw<S>,
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area_b: impl Into<Option<XYWH<S::Unit>>>,
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origin_b: impl Into<Option<Azimuth>>,
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) -> Usually<(Option<XYWH<S::Unit>>, Option<XYWH<S::Unit>>)> {
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let draw_a = |to: &mut S|Ok::<_, Box<dyn Error>>(if let Some(origin_a) = origin_a.into() {
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to.clip(area_a.into(), |to|a.align(origin_a).draw(to))?
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} else {
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to.clip(area_a.into(), |to|a.draw(to))?
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});
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let draw_b = |to: &mut S|Ok::<_, Box<dyn Error>>(if let Some(origin_b) = origin_b.into() {
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to.clip(area_b.into(), |to|b.align(origin_b).draw(to))?
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} else {
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to.clip(area_b.into(), |to|b.draw(to))?
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});
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Ok(if matches!(split, Split::Below) {
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let drawn_b = draw_b(to)?;
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let drawn_a = draw_a(to)?;
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(drawn_a, drawn_b)
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} else {
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(draw_a(to)?, draw_b(to)?)
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})
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}
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pub fn stack_areas <S: Screen> (
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split: &Split,
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area: XYWH<S::Unit>,
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a: &impl Draw<S>,
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b: &impl Draw<S>,
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) -> Usually<(Option<XYWH<S::Unit>>, Option<XYWH<S::Unit>>)> {
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let area_a = a.layout(area)?;
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Ok(match split {
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Split::South => (
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area_a,
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if let Some(used) = area_a {
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b.layout(XYWH(area.x(), area.y() + used.h(), area.w(), area.h().minus(used.h())))?
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} else {
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None
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}
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),
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Split::East => (
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area_a,
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if let Some(used) = area_a {
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b.layout(XYWH(area.x() + used.w(), area.y(), area.w().minus(used.w()), area.h()))?
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} else {
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None
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}
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),
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Split::North => (
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if let Some(used) = area_a {
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Some(XYWH(used.x(), (area.y() + area.h()).minus(used.h()), used.w(), used.h()))
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} else {
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None
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},
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if let Some(used) = area_a {
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b.layout(XYWH(area.x(), area.y(), area.w(), area.h().minus(used.h())))?
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} else {
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b.layout(area)?.map(|area_b|XYWH(
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area_b.x(), area_b.y() + area_b.h(), area_b.w(), area_b.h()
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))
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}
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),
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Split::West => (
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if let Some(used) = area_a {
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Some(XYWH((area.x() + area.w()).minus(used.w()), used.y(), used.w(), used.h()))
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} else {
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None
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},
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if let Some(used) = area_a {
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b.layout(XYWH(area.x(), area.y(), area.w().minus(used.w()), area.h()))?
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} else {
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b.layout(area)?.map(|area_b|XYWH(
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area_b.x() + area_b.w(), area_b.y(), area_b.w(), area_b.h()
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))
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}
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),
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Split::Above | Split::Below => (
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area_a,
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b.layout(area)?,
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),
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})
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}
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fn stack_drawn <S: Coord> (
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split: &Split,
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drawn_a: Option<XYWH<S>>,
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drawn_b: Option<XYWH<S>>,
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) -> Option<XYWH<S>> {
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if let (Some(XYWH(xa, ya, wa, ha)), Some(XYWH(xb, yb, wb, hb))) = (drawn_a, drawn_b) {
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match split {
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Split::South => Some(XYWH(xa.min(xb), ya, wa.max(wb), ha + hb)),
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Split::East => Some(XYWH(xa, ya.min(yb), wa + wb, ha.max(hb))),
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Split::North => Some(XYWH(xa.min(xb), yb, wa.max(wb), ha + hb)),
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Split::West => Some(XYWH(xb, ya.min(yb), wa + wb, ha.max(hb))),
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Split::Above | Split::Below =>
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Some(XYWH(xa.min(xb), ya.min(yb), wa.max(wb), ha.max(hb))),
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}
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} else if let Some(a) = drawn_a {
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Some(a)
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} else if let Some(b) = drawn_b {
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Some(b)
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} else {
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None
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}
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}
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#[macro_export] macro_rules! north {
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($head:expr $(,)?) => { $head };
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($head:expr, $($tail:expr),* $(,)?) => { north($head, north!($($tail,)*)) };
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}
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#[macro_export] macro_rules! south {
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($head:expr $(,)?) => { $head };
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($head:expr, $($tail:expr),* $(,)?) => { south($head, south!($($tail,)*)) };
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}
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#[macro_export] macro_rules! east {
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($head:expr $(,)?) => { $head };
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($head:expr, $($tail:expr),* $(,)?) => { east($head, east!($($tail,)*)) };
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}
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#[macro_export] macro_rules! west {
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($head:expr $(,)?) => { $head };
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($head:expr $(, $tail:expr)* $(,)?) => { west($head, west!($($tail,)*)) };
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}
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#[macro_export] macro_rules! above {
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($head:expr $(,)?) => { $head };
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($head:expr $(, $tail:expr)* $(,)?) => { above($head, above!($($tail,)*)) };
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}
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#[macro_export] macro_rules! below {
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($head:expr $(,)?) => { $head };
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($head:expr, $($tail:expr),* $(,)?) => { below($head, below!($($tail,)*)) };
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}
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pub const fn east <S: Screen, A: Draw<S>, B: Draw<S>> (a: A, b: B) -> impl Draw<S> {
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Pair(Split::East, a, b, PhantomData)
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}
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pub const fn north <S: Screen, A: Draw<S>, B: Draw<S>> (a: A, b: B) -> impl Draw<S> {
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Pair(Split::North, a, b, PhantomData)
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}
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pub const fn west <S: Screen, A: Draw<S>, B: Draw<S>> (a: A, b: B) -> impl Draw<S> {
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Pair(Split::West, a, b, PhantomData)
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}
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pub const fn south <S: Screen, A: Draw<S>, B: Draw<S>> (a: A, b: B) -> impl Draw<S> {
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Pair(Split::South, a, b, PhantomData)
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}
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pub const fn above <S: Screen, A: Draw<S>, B: Draw<S>> (a: A, b: B) -> impl Draw<S> {
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Pair(Split::Above, a, b, PhantomData)
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}
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pub const fn below <S: Screen, A: Draw<S>, B: Draw<S>> (a: A, b: B) -> impl Draw<S> {
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Pair(Split::Below, a, b, PhantomData)
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}
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#[cfg(test)] mod test {
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use crate::*;
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#[test] fn test_stack_areas () -> Usually<()> {
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let area = XYWH(0u16, 0, 80, 25);
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assert_eq!(stack_areas(&Split::East, area, &"foo", &"bar")?, (
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Some(XYWH(0u16, 0, 3, 1)),
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Some(XYWH(3u16, 0, 3, 1)),
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));
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assert_eq!(stack_areas(&Split::South, area, &"foo", &"bar")?, (
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Some(XYWH(0u16, 0, 3, 1)),
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Some(XYWH(0u16, 1, 3, 1)),
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));
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Ok(())
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}
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#[test] fn test_split_stack () -> Usually<()> {
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use tengri::{*, Split::*};
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let stack = split(East, "foo", "bar");
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assert_eq!(stack.layout(XYWH(0, 0, 80, 25))?, Some(XYWH(0, 0, 6, 1)));
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let stack = split(South, "foo", "bar");
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assert_eq!(stack.layout(XYWH(0, 0, 80, 25))?, Some(XYWH(0, 0, 3, 2)));
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let stack = split(South, split(East, "foo", "bar"), "baz");
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assert_eq!(stack.layout(XYWH(0, 0, 80, 25))?, Some(XYWH(0, 0, 6, 2)));
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let stack = split(East, split(South, "foo", "bar"), "baz");
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assert_eq!(stack.layout(XYWH(0, 0, 80, 25))?, Some(XYWH(0, 0, 6, 2)));
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Ok(())
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}
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}
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