lib-nested/src/terminal/compositor.rs

96 lines
2.3 KiB
Rust
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use {
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std::{
sync::{Arc, Weak, RwLock},
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collections::HashMap
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},
cgmath::Point2,
crate::{
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core::{InnerViewPort, OuterViewPort, Observer, ObserverExt, ObserverBroadcast},
index::{ImplIndexView},
terminal::{TerminalAtom, TerminalView},
projection::ProjectionHelper
}
};
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
pub struct TerminalCompositor {
layers: Vec<Arc<dyn TerminalView>>,
cast: Arc<RwLock<ObserverBroadcast<dyn TerminalView>>>,
proj_helper: ProjectionHelper<Self>
}
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//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
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impl TerminalCompositor {
pub fn new(
port: InnerViewPort<dyn TerminalView>
) -> Arc<RwLock<Self>> {
let comp = Arc::new(RwLock::new(
TerminalCompositor {
layers: Vec::new(),
cast: port.get_broadcast(),
proj_helper: ProjectionHelper::new()
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}
));
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comp.write().unwrap().proj_helper.set_proj(&comp);
port.set_view(Some(comp.clone()));
comp
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}
pub fn push(&mut self, v: OuterViewPort<dyn TerminalView>) {
self.layers.push(
self.proj_helper.new_index_arg(
v,
|s: &mut Self, pos| {
s.cast.notify(pos);
}
)
);
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}
}
//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
impl ImplIndexView for TerminalCompositor {
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type Key = Point2<i16>;
type Value = TerminalAtom;
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fn get(&self, pos: &Point2<i16>) -> Option<TerminalAtom> {
let mut atom = None;
for layer in self.layers.iter() {
match (atom, layer.get(pos)) {
(None, next) => atom = next,
(Some(last), Some(next)) => atom = Some(next.add_style_back(last.style)),
_ => {}
}
}
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atom
}
fn area(&self) -> Option<Vec<Point2<i16>>> {
let mut area = Some(Vec::new());
for layer in self.layers.iter() {
if let (
Some(mut new_area),
Some(area)
) = (
layer.area(),
area.as_mut()
) {
area.append(&mut new_area);
} else {
area = None;
}
}
area
}
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}