jellyflow-layout 0.1.0

Optional headless graph layout adapters for Jellyflow.
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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

use jellyflow_core::{CanvasPoint, CanvasSize, Graph, GraphId, GraphOp, NodeId};

use crate::{
    LayoutContext, LayoutEngine, LayoutEngineId, LayoutEngineRegistry, LayoutEngineRequest,
    LayoutError, LayoutNodePosition, LayoutRequest, LayoutResult, layout_graph_with_engine,
};

#[derive(Clone)]
struct TestEngine {
    id: LayoutEngineId,
}

impl TestEngine {
    fn new(id: impl Into<LayoutEngineId>) -> Self {
        Self { id: id.into() }
    }
}

impl LayoutEngine for TestEngine {
    fn id(&self) -> LayoutEngineId {
        self.id.clone()
    }

    fn layout(
        &self,
        graph: &Graph,
        _request: &LayoutRequest,
        context: &LayoutContext,
    ) -> Result<LayoutResult, LayoutError> {
        let nodes = graph
            .nodes
            .keys()
            .copied()
            .filter(|node| !context.pinned_nodes.contains(node))
            .map(|node| LayoutNodePosition {
                node,
                pos: CanvasPoint { x: 10.0, y: 20.0 },
                center: CanvasPoint { x: 60.0, y: 40.0 },
                size: CanvasSize {
                    width: 100.0,
                    height: 40.0,
                },
            })
            .collect();

        Ok(LayoutResult {
            nodes,
            edge_routes: Vec::new(),
            bounds: None,
        })
    }
}

#[test]
fn registry_resolves_custom_engine_by_stable_id() {
    let mut registry = LayoutEngineRegistry::new();
    let engine = LayoutEngineId::new("custom.test");
    registry.insert(TestEngine::new(engine.clone())).unwrap();

    let graph = graph_with_one_node(NodeId::from_u128(1));
    let request = LayoutEngineRequest::new(engine.clone(), LayoutRequest::all());
    let result =
        layout_graph_with_engine(&graph, &request, &registry, &LayoutContext::default()).unwrap();

    assert_eq!(registry.engine_ids().collect::<Vec<_>>(), vec![&engine]);
    assert_eq!(result.nodes.len(), 1);
}

#[test]
fn registry_rejects_duplicate_engine_ids() {
    let mut registry = LayoutEngineRegistry::new();
    let engine = LayoutEngineId::new("custom.test");
    registry.insert(TestEngine::new(engine.clone())).unwrap();

    let err = registry
        .insert(TestEngine::new(engine.clone()))
        .expect_err("duplicate engine");

    assert_eq!(err, LayoutError::DuplicateLayoutEngine(engine));
}

#[test]
fn registry_reports_missing_engine() {
    let registry = LayoutEngineRegistry::new();
    let missing = LayoutEngineId::new("missing");
    let graph = Graph::new(GraphId::from_u128(1));
    let request = LayoutEngineRequest::new(missing.clone(), LayoutRequest::all());

    let err = layout_graph_with_engine(&graph, &request, &registry, &LayoutContext::default())
        .expect_err("missing engine");

    assert_eq!(err, LayoutError::MissingLayoutEngine(missing));
}

#[test]
fn engine_request_serializes_engine_id() {
    let request = LayoutEngineRequest::new("custom.test", LayoutRequest::all());

    let encoded = serde_json::to_string(&request).expect("serialize");
    let decoded: LayoutEngineRequest = serde_json::from_str(&encoded).expect("deserialize");

    assert_eq!(decoded.engine.as_str(), "custom.test");
}

#[test]
fn context_pinned_nodes_are_visible_to_engines() {
    let mut registry = LayoutEngineRegistry::new();
    let engine = LayoutEngineId::new("custom.test");
    registry.insert(TestEngine::new(engine.clone())).unwrap();
    let pinned = NodeId::from_u128(1);
    let graph = graph_with_one_node(pinned);
    let request = LayoutEngineRequest::new(engine, LayoutRequest::all());
    let context = LayoutContext::new().with_pinned_nodes([pinned]);

    let result = layout_graph_with_engine(&graph, &request, &registry, &context).unwrap();
    let tx = result.to_transaction(&graph).unwrap();

    assert!(result.nodes.is_empty());
    assert!(tx.is_empty());
}

#[test]
fn generic_result_converts_to_transaction() {
    let mut registry = LayoutEngineRegistry::new();
    let engine = LayoutEngineId::new("custom.test");
    registry.insert(TestEngine::new(engine.clone())).unwrap();
    let node = NodeId::from_u128(1);
    let graph = graph_with_one_node(node);
    let request = LayoutEngineRequest::new(engine, LayoutRequest::all());

    let result =
        layout_graph_with_engine(&graph, &request, &registry, &LayoutContext::default()).unwrap();
    let tx = result.to_transaction(&graph).unwrap();

    assert!(matches!(tx.ops()[0], GraphOp::SetNodePos { id, .. } if id == node));
}

fn graph_with_one_node(node: NodeId) -> Graph {
    use jellyflow_core::{Node, NodeKindKey};

    let mut graph = Graph::new(GraphId::from_u128(1));
    graph.nodes.insert(
        node,
        Node {
            kind: NodeKindKey::new("demo.node"),
            kind_version: 1,
            pos: CanvasPoint { x: 0.0, y: 0.0 },
            origin: None,
            selectable: None,
            focusable: None,
            draggable: None,
            connectable: None,
            deletable: None,
            parent: None,
            extent: None,
            expand_parent: None,
            size: None,
            hidden: false,
            collapsed: false,
            ports: Vec::new(),
            data: serde_json::Value::Null,
        },
    );
    graph
}