cruxlines 0.2.1

Ranks symbol definitions by cross-file references using tree-sitter.
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

use std::path::Path;

use tree_sitter::Node;

use crate::find_references::{location_from_node, walk_tree, Location};

pub(crate) const EXTENSIONS: &[&str] = &["java"];
pub(crate) const REFERENCE_KINDS: &[&str] = &["identifier", "type_identifier"];

pub(crate) fn language() -> tree_sitter::Language {
    tree_sitter_java::LANGUAGE.into()
}

pub(crate) fn emit_definitions(
    path: &Path,
    source: &str,
    tree: &tree_sitter::Tree,
    mut emit: impl FnMut(Location),
) {
    walk_tree(tree, |node| match node.kind() {
        "class_declaration"
        | "interface_declaration"
        | "enum_declaration"
        | "record_declaration"
        | "annotation_type_declaration" => {
            if is_top_level(node) {
                if let Some(name) = node.child_by_field_name("name") {
                    if let Some(location) = location_from_node(path, source, name) {
                        emit(location);
                    }
                }
            }
        }
        _ => {}
    });
}

pub(crate) fn emit_references(
    path: &Path,
    source: &str,
    tree: &tree_sitter::Tree,
    mut emit: impl FnMut(Location),
) {
    walk_tree(tree, |node| {
        if REFERENCE_KINDS.contains(&node.kind()) {
            if let Some(location) = location_from_node(path, source, node) {
                emit(location);
            }
        }
    });
}

fn is_top_level(node: Node) -> bool {
    node.parent()
        .map(|parent| parent.kind() == "program")
        .unwrap_or(false)
}