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support multipass layout, barely
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facile pop culture reference
parent
083ce8ba76
commit
7f9b7091e2
20 changed files with 1581 additions and 1783 deletions
245
src/layout/axis.rs
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245
src/layout/axis.rs
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use crate::*;
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macro_rules! def_layout_modifier {
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(
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$Trait:ident ($fn_x:ident $fn_y:ident $fn_xy:ident),
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$Struct:ident { $X:ident $Y:ident $XY:ident } $kw_name:ident $name:literal
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|$self:ident, $to:ident| $body:block
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) => {
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impl<S: Screen, T: Draw<S>> $Trait<S> for T {}
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pub trait $Trait<S: Screen>: Draw<S> + Sized {
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fn $fn_x <N: Into<Option<S::Unit>> + Copy> (self, x: N)
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-> $Struct<S, Self, N> { $Struct::$X(self, x) }
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fn $fn_y <N: Into<Option<S::Unit>> + Copy> (self, y: N)
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-> $Struct<S, Self, N> { $Struct::$Y(self, y) }
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fn $fn_xy <N: Into<Option<S::Unit>> + Copy> (self, x: N, y: N)
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-> $Struct<S, Self, N> { $Struct::$XY(self, x, y) }
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}
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pub enum $Struct<S: Screen, I: Draw<S>, X: Into<Option<S::Unit>>> {
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__(PhantomData<S>), $X(I, X), $Y(I, X), $XY(I, X, X),
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}
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impl <S: Screen, I: Draw<S>, X: Into<Option<S::Unit>> + Copy> Draw<S> for $Struct<S, I, X> {
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fn draw (&$self, $to: &mut S) -> Perhaps<XYWH<S::Unit>> {
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$body
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}
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}
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fn_kw_layout!($kw_name |state, output, expr| {
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let head = expr.head()?;
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let mut frags = head.src()?.unwrap_or_default().split("/");
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Ok(matches!(expr.head()?, Some("exact")).then(||{
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let args = expr.tail();
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let arg0 = args.head();
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let tail0 = args.tail();
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let arg1 = tail0.head();
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let tail1 = tail0.tail();
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let arg2 = tail1.head();
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eval_xy!(
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$name => expr, head, output, state, frags.next(),
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$fn_xy, $fn_x, $fn_y,
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arg0, arg1, arg2,
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)
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}).transpose()?.flatten())
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});
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}
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}
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def_layout_modifier!(
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CanExact (exact_w exact_h exact_wh),
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Exact { W H WH } kw_exact "exact" |self, to| {
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let XYWH(x, y, w0, h0) = to.area();
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let (item, w, h) = match self {
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Self::W(item, w) => (item, (*w).into().unwrap_or(w0), h0),
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Self::H(item, h) => (item, w0, (*h).into().unwrap_or(h0)),
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Self::WH(item, w, h) => (item, (*w).into().unwrap_or(h0), (*h).into().unwrap_or(h0)),
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_ => unreachable!()
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};
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to.draw(XYWH(x, y, w0, h0), item)
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}
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);
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def_layout_modifier!(
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CanMin (min_w min_h min_wh),
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Min { W H WH } kw_min "min" |self, to| {
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match self {
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Self::__(_) => unreachable!(),
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Self::W(item, w1) if let Some(XYWH(x, y, w, h)) = to.size(None, item)? => {
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let w: S::Unit = (*w1).into().map(|w1|w.max(w1)).unwrap_or(w);
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to.draw(XYWH(x, y, w, h), item)
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},
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Self::H(item, h1) if let Some(XYWH(x, y, w, h)) = to.size(None, item)? => {
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let h: S::Unit = (*h1).into().map(|h1|h.max(h1)).unwrap_or(h);
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to.draw(XYWH(x, y, w, h), item)
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},
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Self::WH(item, w1, h1) if let Some(XYWH(x, y, w, h)) = to.size(None, item)? => {
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let w: S::Unit = (*w1).into().map(|w1|w.max(w1)).unwrap_or(w);
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let h: S::Unit = (*h1).into().map(|h1|h.max(h1)).unwrap_or(h);
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to.draw(XYWH(x, y, w, h), item)
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},
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_ => Ok(None)
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}
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}
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);
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def_layout_modifier!(
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CanMax (max_w max_h max_wh),
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Max { W H WH } kw_max "max" |self, to| {
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let area: XYWH<S::Unit> = to.area();
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let (item, area) = match self {
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Self::W(item, max_w) => (item, XYWH(
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area.0, area.1, (*max_w).into().map(|max|max.min(area.2)).unwrap_or(area.2),
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area.3
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)),
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Self::H(item, max_h) => (item, XYWH(
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area.0, area.1, area.2,
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(*max_h).into().map(|max|max.min(area.3)).unwrap_or(area.3)
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)),
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Self::WH(item, max_w, max_h) => (item, XYWH(
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area.0, area.1, (*max_w).into().map(|max|max.min(area.2)).unwrap_or(area.2),
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(*max_h).into().map(|max|max.min(area.3)).unwrap_or(area.3),
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)),
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_ => return Ok(None)
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};
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to.draw(area, item)
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}
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);
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def_layout_modifier!(
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CanPad (pad_w pad_h pad_wh),
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Pad { X Y XY } kw_pad "pad" |self, to| {
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let area = to.area();
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let (item, area) = match self {
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Self::X(item, w1) => {
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let w1: S::Unit = (*w1).into().unwrap_or_default();
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(item, XYWH(area.0 + w1, area.1, area.2.minus(w1 + w1), area.3))
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},
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Self::Y(item, h1) => {
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let h1: S::Unit = (*h1).into().unwrap_or_default();
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(item, XYWH(area.0, area.1 + h1, area.2, area.3.minus(h1 + h1)))
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},
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Self::XY(item, w1, h1) => {
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let w1: S::Unit = (*w1).into().unwrap_or_default();
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let h1: S::Unit = (*h1).into().unwrap_or_default();
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(item, XYWH(area.0 + w1, area.1 + h1, area.2.minus(w1 + w1), area.3.minus(h1 + h1)))
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},
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_ => return Ok(None)
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};
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item.draw(to)
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}
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);
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def_layout_modifier!(
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CanPush (push_x push_y push_xy),
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Push { X Y XY } kw_push "push" |self, to| {
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match self {
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Self::__(_) => unreachable!(),
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Self::X(item, x1) if let Some(XYWH(x, y, w, h)) = to.size(None, item)? => {
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to.draw(XYWH(x + (*x1).into().unwrap_or_default(), y, w, h), item)
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},
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Self::Y(item, y1) if let Some(XYWH(x, y, w, h)) = to.size(None, item)? => {
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to.draw(XYWH(x, y + (*y1).into().unwrap_or_default(), w, h), item)
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},
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Self::XY(item, x1, y1) if let Some(XYWH(x, y, w, h)) = to.size(None, item)? => {
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to.draw(XYWH(x + (*x1).into().unwrap_or_default(), y + (*y1).into().unwrap_or_default(), w, h), item)
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},
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_ => Ok(None)
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}
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}
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);
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def_layout_modifier!(
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CanPull (pull_x pull_y pull_xy),
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Pull { X Y XY } kw_pull "pull" |self, to| {
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todo!()
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}
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);
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/// Use whole drawing area along one or both axes.
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///
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/// ```
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/// # fn doctest_layout_full () -> Result<(), Box<dyn std::error::Error>> {
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/// use tengri::{Layout, Draw, XYWH};
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/// let area = XYWH(0u16, 0, 80, 25);
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/// assert_eq!("1".layout(area)?, Some(XYWH(0u16, 0, 1, 1)));
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/// assert_eq!("1".full_w().layout(area)?, Some(XYWH(0u16, 0, 80, 1)));
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/// assert_eq!("1".full_h().layout(area)?, Some(XYWH(0u16, 0, 1, 25)));
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/// assert_eq!("1".full_wh().layout(area)?, Some(XYWH(0u16, 0, 80, 25)));
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/// # Ok(()) }
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/// ```
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pub enum Full<T: Screen, I: Draw<T>> {
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__(PhantomData<T>),
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W(I),
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H(I),
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WH(I),
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}
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impl_draw!(<T: Screen, I: Draw<T>,>|self: Full<T, I>, to: T|{
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let XYWH(x0, y0, w0, h0) = to.area();
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match self {
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Self::W(item) => if let Some(XYWH(_, y, _, h)) = to.size(None, item)? {
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to.draw(XYWH(x0, y, w0, h), item)
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} else {
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Ok(None)
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},
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Self::H(item) => if let Some(XYWH(x, _, w, _)) = to.size(None, item)? {
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to.draw(XYWH(x, y0, w, h0), item)
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} else {
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Ok(None)
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},
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Self::WH(item) => if let Some(XYWH(..)) = to.size(None, item)? {
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to.draw(XYWH(x0, y0, w0, h0), item)
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} else {
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Ok(None)
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},
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_ => unreachable!(),
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}
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});
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/// Only draw content if area is above a certain size.
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///
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/// ```
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/// # fn doctest_layout_min () -> Result<(), Box<dyn std::error::Error>> {
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/// use tengri::{Layout, Draw, XYWH};
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/// let area = XYWH(1u16, 1, 80, 25);
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/// assert_eq!("1".min_w(5).layout(area)?, Some(XYWH(1u16, 1, 5, 1)));
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/// assert_eq!("1".min_h(5).layout(area)?, Some(XYWH(1u16, 1, 1, 5)));
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/// assert_eq!("1".min_wh(5, 5).layout(area)?, Some(XYWH(1u16, 1, 5, 5)));
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/// assert_eq!("123456".min_w(5).layout(area)?, Some(XYWH(1u16, 1, 6, 1)));
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/// # Ok(()) }
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/// ```
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/// Move content in the negative direction of one or both axes.
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///
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/// ```
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/// # fn doctest_layout_pull () -> Result<(), Box<dyn std::error::Error>> {
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/// use tengri::{Layout, Draw, XYWH};
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/// let area = XYWH(1u16, 1, 80, 25);
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/// assert_eq!("1".layout(area)?, Some(XYWH(0u16, 0, 1, 1)));
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/// assert_eq!("1".pull_x(1).layout(area)?, Some(XYWH(0u16, 1, 1, 1)));
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/// assert_eq!("1".pull_y(1).layout(area)?, Some(XYWH(1u16, 0, 1, 1)));
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/// assert_eq!("1".pull_xy(1, 1).layout(area)?, Some(XYWH(0u16, 0, 1, 1)));
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/// # Ok(()) }
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/// ```
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/// Move content in the positive direction of one or both axes.
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///
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/// ```
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/// # fn doctest_layout_push () -> Result<(), Box<dyn std::error::Error>> {
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/// use tengri::{Layout, Draw, XYWH};
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/// let area = XYWH(0u16, 0, 80, 25);
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/// assert_eq!("1".layout(area)?, Some(XYWH(0u16, 0, 1, 1)));
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/// assert_eq!("1".push_x(1).layout(area)?, Some(XYWH(1u16, 0, 1, 1)));
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/// assert_eq!("1".push_y(1).layout(area)?, Some(XYWH(0u16, 1, 1, 1)));
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/// assert_eq!("1".push_xy(1, 1).layout(area)?, Some(XYWH(1u16, 1, 1, 1)));
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/// # Ok(()) }
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/// ```
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#[cfg(test)] #[test] fn test_exact () -> Usually<()> {
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let mut screen = Tui::Layout(XYWH(0, 0, 80, 25));
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assert_eq!("FOOBAR\nKILROY".draw(&mut screen)?, Some(XYWH(0, 0, 6, 2)));
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assert_eq!("FOOBAR\nKILROY".exact_w(3).draw(&mut screen)?, Some(XYWH(0, 0, 3, 2)));
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assert_eq!("FOOBAR\nKILROY".exact_h(1).draw(&mut screen)?, Some(XYWH(0, 0, 6, 1)));
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assert_eq!("FOOBAR\nKILROY".exact_wh(2, 1).draw(&mut screen)?, Some(XYWH(0, 0, 2, 1)));
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Ok(())
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}
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