fission-core 0.2.0

Core runtime, state, actions, effects, resources, input, and UI model for Fission
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

use crate::env::{Env, RuntimeState, WindowInsets};
use crate::lowering::{build_layout_tree, LoweringContext};
use crate::ui::traits::Lower;
use crate::ui::widgets::container::Container;
use crate::ui::widgets::safe_area::SafeArea;
use fission_layout::{LayoutEngine, LayoutSize};

#[test]
fn test_safe_area_layout() {
    let mut env = Env::default();
    env.window_insets = WindowInsets {
        top: 44.0,
        bottom: 34.0,
        left: 0.0,
        right: 0.0,
    };

    let runtime_state = RuntimeState::default();

    // SafeArea wrapping a child that has a fixed size
    let safe_area = SafeArea {
        child: Box::new(Container::default().width(100.0).height(100.0).into_node()),
        ..Default::default()
    };

    let mut cx = LoweringContext::new(&env, &runtime_state, None, None);
    let root_id = safe_area.lower(&mut cx);

    let input_nodes = build_layout_tree(&cx.ir, &env);
    let mut engine = LayoutEngine::new();
    engine.rebuild(&input_nodes).unwrap();

    let snapshot = engine
        .compute_layout(
            &input_nodes,
            root_id,
            LayoutSize::new(375.0, 812.0),
            &|_| 0.0,
        )
        .unwrap();

    // Verify root (SafeArea) geometry (fills the viewport)
    let safe_area_geom = snapshot.get_node_geometry(root_id).unwrap();
    assert_eq!(safe_area_geom.rect.width(), 375.0);
    assert_eq!(safe_area_geom.rect.height(), 812.0);

    // Verify child (Container) geometry
    // The child should be inset by the SafeArea's padding.
    let node = cx.ir.nodes.get(&root_id).unwrap();
    let child_id = node.children[0];

    let child_geom = snapshot.get_node_geometry(child_id).unwrap();

    // Expected child position relative to window (0,0):
    // SafeArea is at 0,0.
    // Child is at 0, 44 relative to SafeArea.
    assert_eq!(child_geom.rect.origin.x, 0.0);
    assert_eq!(child_geom.rect.origin.y, 44.0);

    // Expected child size: 100x100
    assert_eq!(child_geom.rect.size.width, 100.0);
    assert_eq!(child_geom.rect.size.height, 100.0);
}