fission_core/ui/widgets/
action_scope.rs

1use crate::internal::InternalLower;
2use crate::lowering::{InternalIrBuilder, InternalLoweringCx};
3use crate::ui::Widget;
4use crate::ActionScopeId;
5use fission_ir::{Op, Semantics, WidgetId};
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: Widget,
17}
18
19impl ActionScope {
20    pub fn new(child_scope_id: ActionScopeId, child: impl Into<Widget>) -> Self {
21        Self {
22            id: child_scope_id,
23            child: child.into(),
24        }
25    }
26}
27
28impl InternalLower for ActionScope {
29    fn lower(&self, cx: &mut InternalLoweringCx) -> WidgetId {
30        let wrapper_id = cx.next_node_id();
31        cx.push_scope(wrapper_id);
32        let child_id = self.child.lower(cx);
33        cx.pop_scope();
34
35        let semantics = Semantics {
36            action_scope_id: Some(self.id.as_u128()),
37            ..Semantics::default()
38        };
39        let mut builder = InternalIrBuilder::new(wrapper_id, Op::Semantics(semantics));
40        builder.add_child(child_id);
41        builder.build(cx)
42    }
43}
fission_core/ui/widgets/action_scope.rs

fission_core/ui/widgets/
action_scope.rs
