wat_service 0.10.2

WebAssembly Text Format language service.
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

use crate::{LanguageService, helpers::LineIndexExt};
use line_index::LineIndex;
use lspt::{SelectionRange, SelectionRangeParams};
use wat_syntax::SyntaxNode;

impl LanguageService {
    /// Handler for `textDocument/selectionRange` request.
    pub fn selection_range(&self, params: SelectionRangeParams) -> Option<Vec<SelectionRange>> {
        let document = self.get_document(params.text_document.uri)?;
        self.with_db(|db| {
            let line_index = document.line_index(db);
            let root = document.root_tree(db);
            params
                .positions
                .into_iter()
                .filter_map(|position| {
                    super::find_meaningful_token(db, document, &root, position).map(|token| {
                        let parent = token.parent();
                        SelectionRange {
                            range: line_index.convert(token.text_range()),
                            parent: Some(Box::new(SelectionRange {
                                range: line_index.convert(parent.text_range()),
                                parent: get_parent_range(parent, line_index),
                            })),
                        }
                    })
                })
                .collect()
        })
    }
}

fn get_parent_range(current: SyntaxNode, line_index: &LineIndex) -> Option<Box<SelectionRange>> {
    current.parent().map(|parent| {
        Box::new(SelectionRange {
            range: line_index.convert(parent.text_range()),
            parent: get_parent_range(parent, line_index),
        })
    })
}