grug-ls 0.1.2

A Language Server for the grug language
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

use lsp_types::Position;
use tree_sitter::Node;

use crate::server::document::{parser_utils, Document, Variable};

#[derive(PartialEq, Eq, Debug)]
pub struct SpotInfo {
    pub variables: Vec<Variable>,
}

pub fn get_nearest_node<'a>(document: &'a Document, position: Position) -> Node<'a> {
    let point = tree_sitter::Point {
        column: position.character as usize,
        row: position.line as usize,
    };
    let maybe_nearest = document.tree.root_node().descendant_for_point_range(point, point).unwrap();

    let mut ret = maybe_nearest;
    
    let mut cursor = maybe_nearest.walk();
    for child in ret.children(&mut cursor) {
        let child_point = child.range().start_point;

        if child_point.row == point.row {
            if child_point.column > point.column {
                break;
            }
        } else if child_point.row > point.row {
            break;
        }

        ret = child;
    }

    ret
}

pub fn get_spot_info(document: &Document, node: &tree_sitter::Node) -> SpotInfo {
    let mut variables: Vec<Variable> = Vec::new();
    for global_var in document.global_vars.iter() {
        variables.push(Variable {
            name: global_var.name.clone(),
            r#type: global_var.r#type.clone(),
        });
    }

    let mut parent = node.clone();

    while let Some(next_parent) = parent.parent() {
        if next_parent.kind() == "source_file" {
            parent = next_parent;
            continue;
        }

        macro_rules! handle {
            ($node:expr) => {
                if $node.kind() == "variable_declaration" {
                    if let Ok(decl) =
                        parser_utils::parse_variable_declaration(&document.content, &$node)
                    {
                        variables.push(decl);
                    }
                }

                if $node.kind() == "function_parameter" {
                    if let Ok(param) =
                        parser_utils::parse_variable_declaration(&document.content, &$node)
                    {
                        variables.push(param);
                    }
                }
            }
        }
        
        let mut current_node = parent;
        handle!(current_node);
        while let Some(sibling) = current_node.prev_sibling() {
            handle!(sibling);
            
            current_node = sibling;
        }

        parent = next_parent;
    }

    SpotInfo { variables }
}

#[test]
pub fn test_var_get() {
    let source = r#"a: i32 = 2
b: f32 = 4.

on_spawn(str: string) {
    c: f32 = 6
    if true {
        no: i32 = 3
    }
    print()
    
    d: f32 = 5
}
"#;

    let mut parser = tree_sitter::Parser::new();
    parser
        .set_language(&tree_sitter_grug::LANGUAGE.into())
        .unwrap();

    let tree = parser.parse(source.as_bytes(), None).unwrap();
    let func_call = tree
        .root_node()
        .named_descendant_for_point_range(
            tree_sitter::Point { row: 8, column: 5 },
            tree_sitter::Point { row: 8, column: 11 },
        )
        .unwrap();

    assert!(func_call.kind() == "function_call");
    assert!(func_call.child_by_field_name("name").unwrap().kind() == "identifier");

    let document = Document::new(
        &mut parser,
        source.as_bytes().to_vec(),
        "tired-box.grug".to_string(),
    );
    assert_eq!(document.entity_type, "box");

    let mut spot_info = get_spot_info(&document, &func_call);
    spot_info.variables.sort();

    use crate::server::document::Type;
    let mut expected = vec![
            Variable {
                name: "a".to_string(),
                r#type: Type::I32,
            },
            Variable {
                name: "b".to_string(),
                r#type: Type::F32,
            },
            Variable {
                name: "c".to_string(),
                r#type: Type::F32,
            },
            Variable {
                name: "str".to_string(),
                r#type: Type::String,
            },
    ];
    expected.sort();

    assert_eq!(
        spot_info,
        SpotInfo {
            variables: expected,
        }
    );
}