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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
extern crate itertools;
extern crate join_to_string;
extern crate ra_syntax;
extern crate rustc_hash;
extern crate superslice;
#[cfg(test)]
#[macro_use]
extern crate test_utils as _test_utils;
mod code_actions;
mod edit;
mod extend_selection;
mod folding_ranges;
mod line_index;
mod symbols;
#[cfg(test)]
mod test_utils;
mod typing;
pub use self::{
code_actions::{add_derive, add_impl, flip_comma, introduce_variable, LocalEdit},
edit::{Edit, EditBuilder},
extend_selection::extend_selection,
folding_ranges::{folding_ranges, Fold, FoldKind},
line_index::{LineCol, LineIndex},
symbols::{file_structure, file_symbols, FileSymbol, StructureNode},
typing::{join_lines, on_enter, on_eq_typed},
};
pub use ra_syntax::AtomEdit;
use ra_syntax::{
algo::find_leaf_at_offset,
ast::{self, AstNode, NameOwner},
SourceFileNode,
Location,
SyntaxKind::{self, *},
SyntaxNodeRef, TextRange, TextUnit,
};
#[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: &SourceFileNode, 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: &SourceFileNode) -> Vec<HighlightedRange> {
let mut res = Vec::new();
for node in file.syntax().descendants() {
let tag = match node.kind() {
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: &SourceFileNode) -> Vec<Diagnostic> {
fn location_to_range(location: Location) -> TextRange {
match location {
Location::Offset(offset) => TextRange::offset_len(offset, 1.into()),
Location::Range(range) => range,
}
}
file.errors()
.into_iter()
.map(|err| Diagnostic {
range: location_to_range(err.location()),
msg: format!("Syntax Error: {}", err),
})
.collect()
}
pub fn syntax_tree(file: &SourceFileNode) -> String {
::ra_syntax::utils::dump_tree(file.syntax())
}
pub fn runnables(file: &SourceFileNode) -> Vec<Runnable> {
file.syntax()
.descendants()
.filter_map(ast::FnDef::cast)
.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()
}
pub fn find_node_at_offset<'a, N: AstNode<'a>>(
syntax: SyntaxNodeRef<'a>,
offset: TextUnit,
) -> Option<N> {
let leaves = find_leaf_at_offset(syntax, offset);
let leaf = leaves
.clone()
.find(|leaf| !leaf.kind().is_trivia())
.or_else(|| leaves.right_biased())?;
leaf.ancestors().filter_map(N::cast).next()
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test_utils::{add_cursor, assert_eq_dbg, extract_offset};
#[test]
fn test_highlighting() {
let file = SourceFileNode::parse(
r#"
// comment
fn main() {}
println!("Hello, {}!", 92);
"#,
);
let hls = highlight(&file);
assert_eq_dbg(
r#"[HighlightedRange { range: [1; 11), tag: "comment" },
HighlightedRange { range: [12; 14), tag: "keyword" },
HighlightedRange { range: [15; 19), tag: "function" },
HighlightedRange { range: [29; 36), tag: "text" },
HighlightedRange { range: [38; 50), tag: "string" },
HighlightedRange { range: [52; 54), tag: "literal" }]"#,
&hls,
);
}
#[test]
fn test_runnables() {
let file = SourceFileNode::parse(
r#"
fn main() {}
#[test]
fn test_foo() {}
#[test]
#[ignore]
fn test_foo() {}
"#,
);
let runnables = runnables(&file);
assert_eq_dbg(
r#"[Runnable { range: [1; 13), kind: Bin },
Runnable { range: [15; 39), kind: Test { name: "test_foo" } },
Runnable { range: [41; 75), kind: Test { name: "test_foo" } }]"#,
&runnables,
)
}
#[test]
fn test_matching_brace() {
fn do_check(before: &str, after: &str) {
let (pos, before) = extract_offset(before);
let file = SourceFileNode::parse(&before);
let new_pos = match matching_brace(&file, pos) {
None => pos,
Some(pos) => pos,
};
let actual = add_cursor(&before, new_pos);
assert_eq_text!(after, &actual);
}
do_check("struct Foo { a: i32, }<|>", "struct Foo <|>{ a: i32, }");
}
}
|
