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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
extern crate libsyntax2;
extern crate superslice;
extern crate itertools;
mod extend_selection;
mod symbols;
mod line_index;
mod edit;
mod code_actions;
mod typing;
use libsyntax2::{
File, TextUnit, TextRange,
ast::{AstNode, NameOwner},
algo::{walk, find_leaf_at_offset},
SyntaxKind::{self, *},
};
pub use libsyntax2::AtomEdit;
pub use self::{
line_index::{LineIndex, LineCol},
extend_selection::extend_selection,
symbols::{StructureNode, file_structure, FileSymbol, file_symbols},
edit::{EditBuilder, Edit},
code_actions::{
ActionResult, find_node,
flip_comma, add_derive, add_impl,
},
typing::join_lines,
};
#[derive(Debug)]
pub struct HighlightedRange {
pub range: TextRange,
pub tag: &'static str,
}
#[derive(Debug)]
pub struct Diagnostic {
pub range: TextRange,
pub msg: String,
}
#[derive(Debug)]
pub struct Runnable {
pub range: TextRange,
pub kind: RunnableKind,
}
#[derive(Debug)]
pub enum RunnableKind {
Test { name: String },
Bin,
}
pub fn matching_brace(file: &File, offset: TextUnit) -> Option<TextUnit> {
const BRACES: &[SyntaxKind] = &[
L_CURLY, R_CURLY,
L_BRACK, R_BRACK,
L_PAREN, R_PAREN,
L_ANGLE, R_ANGLE,
];
let (brace_node, brace_idx) = find_leaf_at_offset(file.syntax(), offset)
.filter_map(|node| {
let idx = BRACES.iter().position(|&brace| brace == node.kind())?;
Some((node, idx))
})
.next()?;
let parent = brace_node.parent()?;
let matching_kind = BRACES[brace_idx ^ 1];
let matching_node = parent.children()
.find(|node| node.kind() == matching_kind)?;
Some(matching_node.range().start())
}
pub fn highlight(file: &File) -> Vec<HighlightedRange> {
let mut res = Vec::new();
for node in walk::preorder(file.syntax()) {
let tag = match node.kind() {
ERROR => "error",
COMMENT | DOC_COMMENT => "comment",
STRING | RAW_STRING | RAW_BYTE_STRING | BYTE_STRING => "string",
ATTR => "attribute",
NAME_REF => "text",
NAME => "function",
INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE => "literal",
LIFETIME => "parameter",
k if k.is_keyword() => "keyword",
_ => continue,
};
res.push(HighlightedRange {
range: node.range(),
tag,
})
}
res
}
pub fn diagnostics(file: &File) -> Vec<Diagnostic> {
let mut res = Vec::new();
for node in walk::preorder(file.syntax()) {
if node.kind() == ERROR {
res.push(Diagnostic {
range: node.range(),
msg: "Syntax Error".to_string(),
});
}
}
res.extend(file.errors().into_iter().map(|err| Diagnostic {
range: TextRange::offset_len(err.offset, 1.into()),
msg: err.msg,
}));
res
}
pub fn syntax_tree(file: &File) -> String {
::libsyntax2::utils::dump_tree(file.syntax())
}
pub fn runnables(file: &File) -> Vec<Runnable> {
file.ast()
.functions()
.filter_map(|f| {
let name = f.name()?.text();
let kind = if name == "main" {
RunnableKind::Bin
} else if f.has_atom_attr("test") {
RunnableKind::Test {
name: name.to_string()
}
} else {
return None;
};
Some(Runnable {
range: f.syntax().range(),
kind,
})
})
.collect()
}
|
