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
|
#[macro_use]
extern crate failure;
extern crate parking_lot;
#[macro_use]
extern crate log;
extern crate once_cell;
extern crate libsyntax2;
extern crate libeditor;
extern crate fst;
extern crate rayon;
mod symbol_index;
use once_cell::sync::OnceCell;
use rayon::prelude::*;
use std::{
sync::{
Arc,
atomic::{AtomicUsize, Ordering::SeqCst},
},
collections::hash_map::HashMap,
time::Instant,
};
use libsyntax2::{
TextUnit,
ast::{self, AstNode},
};
use libeditor::{LineIndex, FileSymbol, find_node};
use self::symbol_index::FileSymbols;
pub use self::symbol_index::Query;
pub type Result<T> = ::std::result::Result<T, ::failure::Error>;
const INDEXING_THRESHOLD: usize = 128;
pub struct WorldState {
data: Arc<WorldData>
}
#[derive(Clone, Debug)]
pub struct World {
data: Arc<WorldData>,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct FileId(pub u32);
impl WorldState {
pub fn new() -> WorldState {
WorldState {
data: Arc::new(WorldData::default())
}
}
pub fn snapshot(&self) -> World {
World { data: self.data.clone() }
}
pub fn change_file(&mut self, file_id: FileId, text: Option<String>) {
self.change_files(::std::iter::once((file_id, text)));
}
pub fn change_files(&mut self, changes: impl Iterator<Item=(FileId, Option<String>)>) {
let data = self.data_mut();
let mut cnt = 0;
for (id, text) in changes {
cnt += 1;
data.file_map.remove(&id);
if let Some(text) = text {
let file_data = FileData::new(text);
data.file_map.insert(id, Arc::new(file_data));
} else {
data.file_map.remove(&id);
}
}
*data.unindexed.get_mut() += cnt;
}
fn data_mut(&mut self) -> &mut WorldData {
if Arc::get_mut(&mut self.data).is_none() {
self.data = Arc::new(WorldData {
unindexed: AtomicUsize::new(
self.data.unindexed.load(SeqCst)
),
file_map: self.data.file_map.clone(),
});
}
Arc::get_mut(&mut self.data).unwrap()
}
}
impl World {
pub fn file_syntax(&self, file_id: FileId) -> Result<ast::File> {
let data = self.file_data(file_id)?;
Ok(data.syntax().clone())
}
pub fn file_line_index(&self, id: FileId) -> Result<LineIndex> {
let data = self.file_data(id)?;
let index = data.lines
.get_or_init(|| LineIndex::new(&data.text));
Ok(index.clone())
}
pub fn world_symbols<'a>(&'a self, mut query: Query) -> impl Iterator<Item=(FileId, &'a FileSymbol)> + 'a {
self.reindex();
self.data.file_map.iter()
.flat_map(move |(id, data)| {
let symbols = data.symbols();
query.process(symbols).into_iter().map(move |s| (*id, s))
})
}
pub fn approximately_resolve_symbol<'a>(
&'a self,
id: FileId,
offset: TextUnit,
) -> Result<Vec<(FileId, &'a FileSymbol)>> {
let file = self.file_syntax(id)?;
let syntax = file.syntax();
let syntax = syntax.as_ref();
let name_ref = find_node::<ast::NameRef<_>>(syntax, offset);
let name = match name_ref {
None => return Ok(vec![]),
Some(name_ref) => name_ref.text(),
};
let mut query = Query::new(name.to_string());
query.exact();
query.limit(4);
Ok(self.world_symbols(query).collect())
}
fn reindex(&self) {
let data = &*self.data;
let unindexed = data.unindexed.load(SeqCst);
if unindexed < INDEXING_THRESHOLD {
return;
}
if unindexed == data.unindexed.compare_and_swap(unindexed, 0, SeqCst) {
let now = Instant::now();
data.file_map
.par_iter()
.for_each(|(_, data)| {
data.symbols();
});
info!("parallel indexing took {:?}", now.elapsed());
}
}
fn file_data(&self, file_id: FileId) -> Result<Arc<FileData>> {
match self.data.file_map.get(&file_id) {
Some(data) => Ok(data.clone()),
None => bail!("unknown file: {:?}", file_id),
}
}
}
#[derive(Default, Debug)]
struct WorldData {
unindexed: AtomicUsize,
file_map: HashMap<FileId, Arc<FileData>>,
}
#[derive(Debug)]
struct FileData {
text: String,
symbols: OnceCell<FileSymbols>,
syntax: OnceCell<ast::File>,
lines: OnceCell<LineIndex>,
}
impl FileData {
fn new(text: String) -> FileData {
FileData {
text,
symbols: OnceCell::new(),
syntax: OnceCell::new(),
lines: OnceCell::new(),
}
}
fn syntax(&self) -> &ast::File {
self.syntax
.get_or_init(|| ast::File::parse(&self.text))
}
fn syntax_transient(&self) -> ast::File {
self.syntax.get().map(|s| s.clone())
.unwrap_or_else(|| ast::File::parse(&self.text))
}
fn symbols(&self) -> &FileSymbols {
let syntax = self.syntax_transient();
self.symbols
.get_or_init(|| FileSymbols::new(&syntax))
}
}
|
