toml/
fmt.rs

1#[derive(Copy, Clone, Default)]
2pub(crate) struct DocumentFormatter {
3    pub(crate) multiline_array: bool,
4    is_value: bool,
5}
6
7impl toml_edit::visit_mut::VisitMut for DocumentFormatter {
8    fn visit_document_mut(&mut self, node: &mut toml_edit::DocumentMut) {
9        toml_edit::visit_mut::visit_document_mut(self, node);
10    }
11
12    fn visit_item_mut(&mut self, node: &mut toml_edit::Item) {
13        let is_parent_value = self.is_value;
14        if !is_parent_value {
15            let other = std::mem::take(node);
16            let other = match other.into_table().map(toml_edit::Item::Table) {
17                Ok(i) => i,
18                Err(i) => i,
19            };
20            let other = match other
21                .into_array_of_tables()
22                .map(toml_edit::Item::ArrayOfTables)
23            {
24                Ok(i) => i,
25                Err(i) => i,
26            };
27            self.is_value = other.is_value();
28            *node = other;
29        }
30
31        toml_edit::visit_mut::visit_item_mut(self, node);
32        self.is_value = is_parent_value;
33    }
34
35    fn visit_table_mut(&mut self, node: &mut toml_edit::Table) {
36        node.decor_mut().clear();
37
38        // Empty tables could be semantically meaningful, so make sure they are not implicit
39        if !node.is_empty() {
40            node.set_implicit(true);
41        }
42
43        toml_edit::visit_mut::visit_table_mut(self, node);
44    }
45
46    fn visit_value_mut(&mut self, node: &mut toml_edit::Value) {
47        node.decor_mut().clear();
48
49        toml_edit::visit_mut::visit_value_mut(self, node);
50    }
51
52    fn visit_array_mut(&mut self, node: &mut toml_edit::Array) {
53        toml_edit::visit_mut::visit_array_mut(self, node);
54
55        if !self.multiline_array || (0..=1).contains(&node.len()) {
56            node.set_trailing("");
57            node.set_trailing_comma(false);
58        } else {
59            for item in node.iter_mut() {
60                item.decor_mut().set_prefix("\n    ");
61            }
62            node.set_trailing("\n");
63            node.set_trailing_comma(true);
64        }
65    }
66}
toml/fmt.rs

toml/
fmt.rs
