toml/
fmt.rs

1#[derive(Copy, Clone, Default)]
2pub(crate) struct DocumentFormatter {
3    pub(crate) multiline_array: bool,
4}
5
6impl toml_edit::visit_mut::VisitMut for DocumentFormatter {
7    fn visit_document_mut(&mut self, node: &mut toml_edit::Document) {
8        toml_edit::visit_mut::visit_document_mut(self, node);
9    }
10
11    fn visit_item_mut(&mut self, node: &mut toml_edit::Item) {
12        let other = std::mem::take(node);
13        let other = match other.into_table().map(toml_edit::Item::Table) {
14            Ok(i) => i,
15            Err(i) => i,
16        };
17        let other = match other
18            .into_array_of_tables()
19            .map(toml_edit::Item::ArrayOfTables)
20        {
21            Ok(i) => i,
22            Err(i) => i,
23        };
24        *node = other;
25
26        toml_edit::visit_mut::visit_item_mut(self, node);
27    }
28
29    fn visit_table_mut(&mut self, node: &mut toml_edit::Table) {
30        node.decor_mut().clear();
31
32        // Empty tables could be semantically meaningful, so make sure they are not implicit
33        if !node.is_empty() {
34            node.set_implicit(true);
35        }
36
37        toml_edit::visit_mut::visit_table_mut(self, node);
38    }
39
40    fn visit_value_mut(&mut self, node: &mut toml_edit::Value) {
41        node.decor_mut().clear();
42
43        toml_edit::visit_mut::visit_value_mut(self, node);
44    }
45
46    fn visit_array_mut(&mut self, node: &mut toml_edit::Array) {
47        toml_edit::visit_mut::visit_array_mut(self, node);
48
49        if !self.multiline_array || (0..=1).contains(&node.len()) {
50            node.set_trailing("");
51            node.set_trailing_comma(false);
52        } else {
53            for item in node.iter_mut() {
54                item.decor_mut().set_prefix("\n    ");
55            }
56            node.set_trailing("\n");
57            node.set_trailing_comma(true);
58        }
59    }
60}
toml/fmt.rs

toml/
fmt.rs
