fission_core/ui/widgets/
action_scope.rs

1use crate::lowering::{LoweringContext, NodeBuilder};
2use crate::ui::traits::Lower;
3use crate::ui::Node;
4use crate::ActionScopeId;
5use fission_ir::{NodeId, Op, Semantics};
6use serde::{Deserialize, Serialize};
7
8/// Tags a subtree with a raw action dispatch scope.
9///
10/// The widget does not change layout or paint output. It inserts a semantics
11/// wrapper so descendants dispatch actions with this scope in their
12/// [`ActionInput`](crate::ActionInput).
13#[derive(Debug, Clone, Serialize, Deserialize)]
14pub struct ActionScope {
15    pub id: ActionScopeId,
16    pub child: Box<Node>,
17}
18
19impl ActionScope {
20    pub fn new(id: ActionScopeId, child: Node) -> Self {
21        Self {
22            id,
23            child: Box::new(child),
24        }
25    }
26
27    pub fn into_node(self) -> Node {
28        Node::ActionScope(self)
29    }
30}
31
32impl Lower for ActionScope {
33    fn lower(&self, cx: &mut LoweringContext) -> NodeId {
34        let wrapper_id = cx.next_node_id();
35        cx.push_scope(wrapper_id);
36        let child_id = self.child.lower(cx);
37        cx.pop_scope();
38
39        let semantics = Semantics {
40            action_scope_id: Some(self.id.as_u128()),
41            ..Semantics::default()
42        };
43        let mut builder = NodeBuilder::new(wrapper_id, Op::Semantics(semantics));
44        builder.add_child(child_id);
45        builder.build(cx)
46    }
47}
fission_core/ui/widgets/action_scope.rs

fission_core/ui/widgets/
action_scope.rs
