emmylua_parser/text/
text_range.rs

1use rowan::TextRange;
2
3#[derive(Debug, Clone, Copy, PartialEq, Eq)]
4pub struct SourceRange {
5    pub start_offset: usize,
6    pub length: usize,
7}
8
9impl SourceRange {
10    pub fn new(start_offset: usize, length: usize) -> SourceRange {
11        SourceRange {
12            start_offset,
13            length,
14        }
15    }
16
17    pub fn from_start_end(start_offset: usize, end_offset: usize) -> Self {
18        assert!(start_offset <= end_offset);
19        Self::new(start_offset, end_offset - start_offset)
20    }
21
22    pub const EMPTY: SourceRange = SourceRange {
23        start_offset: 0,
24        length: 0,
25    };
26
27    pub fn end_offset(&self) -> usize {
28        self.start_offset + self.length
29    }
30
31    pub fn contains(&self, offset: usize) -> bool {
32        offset >= self.start_offset && offset < self.end_offset()
33    }
34
35    pub fn contains_inclusive(&self, offset: usize) -> bool {
36        offset >= self.start_offset && offset <= self.end_offset()
37    }
38
39    pub fn contain_range(&self, range: &SourceRange) -> bool {
40        range.start_offset >= self.start_offset && range.end_offset() <= self.end_offset()
41    }
42
43    pub fn intersect(&self, range: &SourceRange) -> bool {
44        self.start_offset < range.end_offset() && range.start_offset < self.end_offset()
45    }
46
47    pub fn moved(&self, offset: usize) -> SourceRange {
48        debug_assert!(offset <= self.length);
49        SourceRange::new(self.start_offset + offset, self.length - offset)
50    }
51
52    pub fn merge(&self, range: &SourceRange) -> SourceRange {
53        let start = self.start_offset.min(range.start_offset);
54        let end = self.end_offset().max(range.end_offset());
55        SourceRange {
56            start_offset: start,
57            length: end - start,
58        }
59    }
60
61    pub fn is_empty(&self) -> bool {
62        self.length == 0
63    }
64}
65
66impl std::fmt::Display for SourceRange {
67    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
68        write!(f, "[{}, {})", self.start_offset, self.end_offset())
69    }
70}
71
72impl From<SourceRange> for TextRange {
73    fn from(val: SourceRange) -> Self {
74        TextRange::new(
75            (val.start_offset as u32).into(),
76            (val.end_offset() as u32).into(),
77        )
78    }
79}
80
81impl From<TextRange> for SourceRange {
82    fn from(val: TextRange) -> Self {
83        SourceRange::new(val.start().into(), val.len().into())
84    }
85}
emmylua_parser/text/text_range.rs

emmylua_parser/text/
text_range.rs
