fission-core 0.14.1

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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

use fission_core::event::{InputEvent, PointerButton, PointerEvent};
use fission_core::{ActionEnvelope, ActionId, GlobalState, Runtime};
use fission_ir::semantics::ActionTrigger;
use fission_ir::WidgetId;
use fission_ir::{ActionEntry, ActionSet, CompositeStyle, CoreIR, CoreNode, Op, Role, Semantics};
use fission_layout::{LayoutNodeGeometry, LayoutPoint, LayoutRect, LayoutSize, LayoutSnapshot};

#[derive(Default, Debug, Clone)]
struct SliderState {
    changes: usize,
    value: f32,
}

impl GlobalState for SliderState {}

#[test]
fn slider_pointer_up_does_not_replay_template_change_payload() -> anyhow::Result<()> {
    let action_id = ActionId::from_name("fission_core_test::SliderChanged");
    let slider_id = WidgetId::explicit("slider");
    let (ir, layout) = slider_tree(slider_id, action_id);
    let mut runtime = Runtime::default();
    runtime.add_app_state(Box::new(SliderState::default()))?;
    runtime.register_reducer::<SliderState>(action_id, record_slider_change)?;

    let point = LayoutPoint::new(150.0, 20.0);
    runtime.handle_input(
        InputEvent::Pointer(PointerEvent::Down {
            pointer_id: Default::default(),
            kind: Default::default(),
            point,
            button: PointerButton::Primary,
            modifiers: 0,
        }),
        &ir,
        &layout,
    )?;
    runtime.handle_input(
        InputEvent::Pointer(PointerEvent::Up {
            pointer_id: Default::default(),
            kind: Default::default(),
            point,
            button: PointerButton::Primary,
            modifiers: 0,
        }),
        &ir,
        &layout,
    )?;

    let state = runtime
        .get_app_state::<SliderState>()
        .expect("slider state");
    assert_eq!(state.changes, 1);
    assert_eq!(state.value, 25.0);
    Ok(())
}

#[test]
fn secondary_click_does_not_change_slider_value() -> anyhow::Result<()> {
    let action_id = ActionId::from_name("fission_core_test::SliderChanged");
    let slider_id = WidgetId::explicit("slider");
    let (ir, layout) = slider_tree(slider_id, action_id);
    let mut runtime = Runtime::default();
    runtime.add_app_state(Box::new(SliderState::default()))?;
    runtime.register_reducer::<SliderState>(action_id, record_slider_change)?;

    let point = LayoutPoint::new(150.0, 20.0);
    runtime.handle_input(
        InputEvent::Pointer(PointerEvent::Down {
            pointer_id: Default::default(),
            kind: Default::default(),
            point,
            button: PointerButton::Secondary,
            modifiers: 0,
        }),
        &ir,
        &layout,
    )?;
    runtime.handle_input(
        InputEvent::Pointer(PointerEvent::Up {
            pointer_id: Default::default(),
            kind: Default::default(),
            point,
            button: PointerButton::Secondary,
            modifiers: 0,
        }),
        &ir,
        &layout,
    )?;

    let state = runtime
        .get_app_state::<SliderState>()
        .expect("slider state");
    assert_eq!(state.changes, 0);
    assert_eq!(state.value, 0.0);
    Ok(())
}

fn record_slider_change(
    state: &mut SliderState,
    action: &ActionEnvelope,
    _target: WidgetId,
) -> anyhow::Result<()> {
    state.changes += 1;
    state.value = serde_json::from_slice(&action.payload)?;
    Ok(())
}

fn slider_tree(slider_id: WidgetId, action_id: ActionId) -> (CoreIR, LayoutSnapshot) {
    let mut ir = CoreIR::default();
    ir.root = Some(slider_id);
    ir.nodes.insert(
        slider_id,
        CoreNode {
            id: slider_id,
            op: Op::Semantics(Semantics {
                role: Role::Slider,
                focusable: true,
                draggable: true,
                min_value: Some(0.0),
                max_value: Some(100.0),
                current_value: Some(0.0),
                actions: ActionSet {
                    entries: vec![ActionEntry {
                        trigger: ActionTrigger::Change,
                        action_id: action_id.as_u128(),
                        payload_data: Some(serde_json::to_vec(&0.0).unwrap()),
                    }],
                },
                ..Default::default()
            }),
            composite: CompositeStyle::default(),
            children: Vec::new(),
            parent: None,
            hash: 0,
        },
    );

    let mut layout = LayoutSnapshot::new(LayoutSize::new(300.0, 100.0));
    layout.nodes.insert(
        slider_id,
        LayoutNodeGeometry {
            rect: LayoutRect::new(100.0, 10.0, 200.0, 20.0),
            content_size: LayoutSize::new(200.0, 20.0),
        },
    );
    (ir, layout)
}