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output: more big refactors
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parent
194f2f9874
commit
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68 changed files with 1604 additions and 1016 deletions
220
output/src/layout/layout_cond.rs
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220
output/src/layout/layout_cond.rs
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use crate::*;
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/// Show an item only when a condition is true.
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pub struct When<A>(pub bool, pub A);
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impl<A> When<A> {
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/// Create a binary condition.
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pub const fn new (c: bool, a: A) -> Self { Self(c, a) }
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}
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impl<E: Out, A: Layout<E>> Layout<E> for When<A> {
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fn layout (&self, to: E::Area) -> E::Area {
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let Self(cond, item) = self;
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let mut area = E::Area::zero();
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if *cond {
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let item_area = item.layout(to);
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area[0] = item_area.x();
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area[1] = item_area.y();
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area[2] = item_area.w();
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area[3] = item_area.h();
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}
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area.into()
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}
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}
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impl<E: Out, A: Draw<E>> Draw<E> for When<A> {
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fn draw (&self, to: &mut E) {
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let Self(cond, item) = self;
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if *cond { item.draw(to) }
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}
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}
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/// Show one item if a condition is true and another if the condition is false
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pub struct Either<E: Out, A: Draw<E> + Layout<E>, B: Draw<E> + Layout<E>>(pub bool, pub A, pub B, pub PhantomData<E>);
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impl<E: Out, A: Draw<E> + Layout<E>, B: Draw<E> + Layout<E>> Either<E, A, B> {
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/// Create a ternary view condition.
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pub const fn new (c: bool, a: A, b: B) -> Self {
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Self(c, a, b, PhantomData)
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}
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}
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impl<E: Out, A: Draw<E> + Layout<E>, B: Draw<E> + Layout<E>> Layout<E> for Either<E, A, B> {
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fn layout (&self, to: E::Area) -> E::Area {
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let Self(cond, a, b, ..) = self;
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if *cond { a.layout(to) } else { b.layout(to) }
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}
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}
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impl<E: Out, A: Draw<E> + Layout<E>, B: Draw<E> + Layout<E>> Draw<E> for Either<E, A, B> {
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fn draw (&self, to: &mut E) {
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let Self(cond, a, b, ..) = self;
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if *cond { a.draw(to) } else { b.draw(to) }
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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///// The syntagm `(when :condition :content)` corresponds to a [When] layout element.
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//impl<S, A> FromDsl<S> for When<A> where bool: FromDsl<S>, A: FromDsl<S> {
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//fn try_provide (state: &S, source: &DslVal<impl DslStr, impl DslExpr>) -> Perhaps<Self> {
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//source.exp_match("when", |_, tail|Ok(Some(Self(
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//FromDsl::<S>::provide(state,
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//tail.nth(0, ||"no condition".into())?, ||"no condition".into())?,
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//FromDsl::<S>::provide(state,
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//tail.nth(1, ||"no content".into())?, ||"no content".into())?,
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//))))
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//}
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//}
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///// The syntagm `(either :condition :content1 :content2)` corresponds to an [Either] layout element.
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//impl<S, A, B> FromDsl<S> for Either<A, B> where S: Eval<Ast, bool> + Eval<Ast, A> + Eval<Ast, B> {
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//fn try_provide (state: &S, source: &DslVal<impl DslStr, impl DslExpr>) -> Perhaps<Self> {
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//source.exp_match("either", |_, tail|Ok(Some(Self(
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//state.eval(tail.nth(0, ||"no condition")?, ||"no condition")?,
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//state.eval(tail.nth(1, ||"no content 1")?, ||"no content 1")?,
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//state.eval(tail.nth(2, ||"no content 1")?, ||"no content 2")?,
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//))))
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//}
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//}
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///// The syntagm `(align/* :content)` corresponds to an [Align] layout element,
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///// where `*` specifies the direction of the alignment.
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//impl<S, A> FromDsl<S> for Align<A> where S: Eval<Option<Ast>, A> {
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//fn try_provide (state: &S, source: &DslVal<impl DslStr, impl DslExpr>) -> Perhaps<Self> {
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//source.exp_match("align/", |head, tail|Ok(Some(match head {
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//"c" => Self::c(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"x" => Self::x(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"y" => Self::y(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"n" => Self::n(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"s" => Self::s(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"e" => Self::e(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"w" => Self::w(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"nw" => Self::nw(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"ne" => Self::ne(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"sw" => Self::sw(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//"se" => Self::se(state.eval(tail.nth(0, ||"no content")?, ||"no content")),
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//_ => return Err("invalid align variant".into())
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//})))
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//}
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//}
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///// The syntagm `(bsp/* :content1 :content2)` corresponds to a [Bsp] layout element,
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///// where `*` specifies the direction of the split.
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//impl<S, A, B> FromDsl<S> for Bsp<A, B> where S: Eval<Option<Ast>, A> + Eval<Option<Ast>, B> {
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//fn try_provide (state: &S, source: &DslVal<impl DslStr, impl DslExpr>) -> Perhaps<Self> {
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//source.exp_match("bsp/", |head, tail|Ok(Some(match head {
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//"n" => Self::n(tail.nth(0, ||"no content 1"), tail.nth(1, ||"no content 2")),
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//"s" => Self::s(tail.nth(0, ||"no content 1"), tail.nth(1, ||"no content 2")),
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//"e" => Self::e(tail.nth(0, ||"no content 1"), tail.nth(1, ||"no content 2")),
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//"w" => Self::w(tail.nth(0, ||"no content 1"), tail.nth(1, ||"no content 2")),
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//"a" => Self::a(tail.nth(0, ||"no content 1"), tail.nth(1, ||"no content 2")),
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//"b" => Self::b(tail.nth(0, ||"no content 1"), tail.nth(1, ||"no content 2")),
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//_ => return Ok(None),
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//})))
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//}
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//}
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//#[cfg(feature = "dsl")] take!($Enum<A>, A|state, words|Ok(
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//if let Some(Token { value: Key(k), .. }) = words.peek() {
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//let mut base = words.clone();
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//let content = state.give_or_fail(words, ||format!("{k}: no content"))?;
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//return Ok(Some(match words.next() {
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//Some(Token{value: Key($x),..}) => Self::x(content),
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//Some(Token{value: Key($y),..}) => Self::y(content),
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//Some(Token{value: Key($xy),..}) => Self::xy(content),
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//_ => unreachable!()
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//}))
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//} else {
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//None
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//}));
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//#[cfg(feature = "dsl")] take!($Enum<U, A>, U, A|state, words|Ok(
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//if let Some(Token { value: Key($x|$y|$xy), .. }) = words.peek() {
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//let mut base = words.clone();
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//Some(match words.next() {
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//Some(Token { value: Key($x), .. }) => Self::x(
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//state.give_or_fail(words, ||"x: no unit")?,
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//state.give_or_fail(words, ||"x: no content")?,
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//),
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//Some(Token { value: Key($y), .. }) => Self::y(
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//state.give_or_fail(words, ||"y: no unit")?,
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//state.give_or_fail(words, ||"y: no content")?,
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//),
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//Some(Token { value: Key($x), .. }) => Self::xy(
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//state.give_or_fail(words, ||"xy: no unit x")?,
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//state.give_or_fail(words, ||"xy: no unit y")?,
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//state.give_or_fail(words, ||"xy: no content")?
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//),
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//_ => unreachable!(),
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//})
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//} else {
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//None
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//}));
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//if let Exp(_, exp) = source.value() {
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//let mut rest = exp.clone();
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//return Ok(Some(match rest.next().as_ref().and_then(|x|x.key()) {
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//Some("bsp/n") => Self::n(
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//state.eval(rest.next(), ||"bsp/n: no content 1")?,
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//state.eval(rest.next(), ||"bsp/n: no content 2")?,
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//),
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//Some("bsp/s") => Self::s(
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//state.eval(rest.next(), ||"bsp/s: no content 1")?,
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//state.eval(rest.next(), ||"bsp/s: no content 2")?,
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//),
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//Some("bsp/e") => Self::e(
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//state.eval(rest.next(), ||"bsp/e: no content 1")?,
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//state.eval(rest.next(), ||"bsp/e: no content 2")?,
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//),
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//Some("bsp/w") => Self::w(
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//state.eval(rest.next(), ||"bsp/w: no content 1")?,
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//state.eval(rest.next(), ||"bsp/w: no content 2")?,
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//),
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//Some("bsp/a") => Self::a(
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//state.eval(rest.next(), ||"bsp/a: no content 1")?,
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//state.eval(rest.next(), ||"bsp/a: no content 2")?,
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//),
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//Some("bsp/b") => Self::b(
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//state.eval(rest.next(), ||"bsp/b: no content 1")?,
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//state.eval(rest.next(), ||"bsp/b: no content 2")?,
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//),
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//_ => return Ok(None),
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//}))
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//}
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//Ok(None)
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//if let Exp(_, source) = source.value() {
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//let mut rest = source.clone();
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//return Ok(Some(match rest.next().as_ref().and_then(|x|x.key()) {
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//Some("align/c") => Self::c(state.eval(rest.next(), ||"align/c: no content")?),
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//Some("align/x") => Self::x(state.eval(rest.next(), ||"align/x: no content")?),
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//Some("align/y") => Self::y(state.eval(rest.next(), ||"align/y: no content")?),
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//Some("align/n") => Self::n(state.eval(rest.next(), ||"align/n: no content")?),
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//Some("align/s") => Self::s(state.eval(rest.next(), ||"align/s: no content")?),
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//Some("align/e") => Self::e(state.eval(rest.next(), ||"align/e: no content")?),
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//Some("align/w") => Self::w(state.eval(rest.next(), ||"align/w: no content")?),
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//Some("align/nw") => Self::nw(state.eval(rest.next(), ||"align/nw: no content")?),
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//Some("align/ne") => Self::ne(state.eval(rest.next(), ||"align/ne: no content")?),
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//Some("align/sw") => Self::sw(state.eval(rest.next(), ||"align/sw: no content")?),
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//Some("align/se") => Self::se(state.eval(rest.next(), ||"align/se: no content")?),
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//_ => return Ok(None),
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//}))
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//}
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//Ok(None)
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//Ok(match source.exp_head().and_then(|e|e.key()) {
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//Some("either") => Some(Self(
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//source.exp_tail().and_then(|t|t.get(0)).map(|x|state.eval(x, ||"when: no condition"))?,
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//source.exp_tail().and_then(|t|t.get(1)).map(|x|state.eval(x, ||"when: no content 1"))?,
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//source.exp_tail().and_then(|t|t.get(2)).map(|x|state.eval(x, ||"when: no content 2"))?,
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//)),
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//_ => None
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//})
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//if let Exp(_, mut exp) = source.value()
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//&& let Some(Ast(Key(id))) = exp.peek() && *id == *"either" {
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//let _ = exp.next();
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//return Ok(Some(Self(
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//state.eval(exp.next().unwrap(), ||"either: no condition")?,
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//state.eval(exp.next().unwrap(), ||"either: no content 1")?,
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//state.eval(exp.next().unwrap(), ||"either: no content 2")?,
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//)))
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//}
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//Ok(None)
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//Ok(match source.exp_head().and_then(|e|e.key()) {
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//Some("when") => Some(Self(
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//source.exp_tail().and_then(|t|t.get(0)).map(|x|state.eval(x, ||"when: no condition"))?,
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//source.exp_tail().and_then(|t|t.get(1)).map(|x|state.eval(x, ||"when: no content"))?,
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//)),
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//_ => None
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//})
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