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ughhh needs special case

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🪞👃🪞 2025-01-18 16:03:06 +01:00
parent cf1fd5b45a
commit a362028ae7
4 changed files with 124 additions and 97 deletions
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62
output/src/view.rs
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@ -7,44 +7,35 @@ use Value::*;
/// * render callback (implementation of [Content])
/// * value providers (implementations of [Context])
#[macro_export] macro_rules! view {
($Output:ty: |$self:ident: $App:ty| $content:expr; {
($Output:ty: |$self:ident: $App:ty| $content:expr $(;{
$( $type:ty { $($sym:literal => $value:expr),* } );*
}) => {
})?) => {
impl Content<$Output> for $App {
fn content(&$self) -> impl Render<$Output> { $content }
}
$(
$($(
impl Context<$type> for $App {
fn get (&$self, atom: &Value) -> Option<$type> {
Some(match atom.to_ref() { $(Atom::Sym($sym) => $value,)* _ => return None })
}
}
)*
)*)?
}
}
/// Implements `Context` for content components and expressions
#[macro_export] macro_rules! provide_content {
(|$self:ident:$State:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
impl<'a, E: Output> Context<'a, Box<dyn Render<E> + 'a>> for $State {
fn get (&$self, atom: &Value) -> Option<Box<dyn Render<E> + 'a>> {
Some(match atom.to_ref() {
$(Atom::Sym($pat) => $expr),*,
_ => return None
})
}
}
};
($Output:ty: |$self:ident:$State:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
impl<'a> Context<'a, Box<dyn Render<$Output> + 'a>> for $State {
fn get (&$self, atom: &Value) -> Option<Box<dyn Render<$Output> + 'a>> {
Some(match atom.to_ref() {
$(Atom::Sym($pat) => $expr),*,
_ => return None
})
pub struct View<'a, T>(pub &'a T, pub TokenIter<'a>);
impl<'a, O: Output + 'a, T: ViewContext<'a, O>> Content<O> for View<'a, T> {
fn content (&self) -> impl Render<O> {
let iter = self.1.clone();
while let Some((Token { value, .. }, _)) = iter.next() {
if let Some(content) = self.0.get_content(&value) {
return Some(content)
}
}
return None
}
}
/// Renders from EDN source and context.
///
/// Generic over:
@ -163,3 +154,28 @@ pub type AtomRenderCallback<'a, O, State> =
}
}
}
/// Implement `Context` for a context and content type.
///
/// This enables support for layout expressions.
#[macro_export] macro_rules! provide_content {
(|$self:ident:$State:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
impl<E: Output> Context<Box<dyn Render<E> + '_>> for $State {
fn get (&$self, atom: &Value) -> Option<Box<dyn Render<E> + '_>> {
Some(match atom {
$(Value::Sym($pat) => $expr,)*
_ => return None
})
}
}
};
($Output:ty: |$self:ident:$State:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
impl Context<Box<dyn Render<$Output> + '_>> for $State {
fn get (&$self, atom: &Value) -> Option<Box<dyn Render<$Output> + '_>> {
Some(match atom {
$(Value::Sym($pat) => $expr,)*
_ => return None
})
}
}
}
}