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
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
use hir::PerNs;
use crate::completion::CompletionContext;
/// `CompletionItem` describes a single completion variant in the editor pop-up.
/// It is basically a POD with various properties. To construct a
/// `CompletionItem`, use `new` method and the `Builder` struct.
#[derive(Debug)]
pub struct CompletionItem {
/// Used only internally in tests, to check only specific kind of
/// completion.
completion_kind: CompletionKind,
label: String,
lookup: Option<String>,
snippet: Option<String>,
kind: Option<CompletionItemKind>,
}
pub enum InsertText {
PlainText { text: String },
Snippet { text: String },
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CompletionItemKind {
Snippet,
Keyword,
Module,
Function,
Struct,
Enum,
EnumVariant,
Binding,
Field,
}
#[derive(Debug, PartialEq, Eq)]
pub(crate) enum CompletionKind {
/// Parser-based keyword completion.
Keyword,
/// Your usual "complete all valid identifiers".
Reference,
/// "Secret sauce" completions.
Magic,
Snippet,
}
impl CompletionItem {
pub(crate) fn new(completion_kind: CompletionKind, label: impl Into<String>) -> Builder {
let label = label.into();
Builder {
completion_kind,
label,
lookup: None,
snippet: None,
kind: None,
}
}
/// What user sees in pop-up in the UI.
pub fn label(&self) -> &str {
&self.label
}
/// What string is used for filtering.
pub fn lookup(&self) -> &str {
self.lookup
.as_ref()
.map(|it| it.as_str())
.unwrap_or(self.label())
}
/// What is inserted.
pub fn insert_text(&self) -> InsertText {
match &self.snippet {
None => InsertText::PlainText {
text: self.label.clone(),
},
Some(it) => InsertText::Snippet { text: it.clone() },
}
}
pub fn kind(&self) -> Option<CompletionItemKind> {
self.kind
}
}
/// A helper to make `CompletionItem`s.
#[must_use]
pub(crate) struct Builder {
completion_kind: CompletionKind,
label: String,
lookup: Option<String>,
snippet: Option<String>,
kind: Option<CompletionItemKind>,
}
impl Builder {
pub(crate) fn add_to(self, acc: &mut Completions) {
acc.add(self.build())
}
pub(crate) fn build(self) -> CompletionItem {
CompletionItem {
label: self.label,
lookup: self.lookup,
snippet: self.snippet,
kind: self.kind,
completion_kind: self.completion_kind,
}
}
pub(crate) fn lookup_by(mut self, lookup: impl Into<String>) -> Builder {
self.lookup = Some(lookup.into());
self
}
pub(crate) fn snippet(mut self, snippet: impl Into<String>) -> Builder {
self.snippet = Some(snippet.into());
self
}
pub(crate) fn kind(mut self, kind: CompletionItemKind) -> Builder {
self.kind = Some(kind);
self
}
pub(super) fn from_resolution(
mut self,
ctx: &CompletionContext,
resolution: &hir::Resolution,
) -> Builder {
let resolved = resolution.def_id.and_then(|d| d.resolve(ctx.db).ok());
let kind = match resolved {
PerNs {
types: Some(hir::Def::Module(..)),
..
} => CompletionItemKind::Module,
PerNs {
types: Some(hir::Def::Struct(..)),
..
} => CompletionItemKind::Struct,
PerNs {
types: Some(hir::Def::Enum(..)),
..
} => CompletionItemKind::Enum,
PerNs {
values: Some(hir::Def::Function(function)),
..
} => {
if let Some(sig_info) = function.signature_info(ctx.db) {
if sig_info.params.is_empty() {
self.snippet = Some(format!("{}()$0", self.label));
} else {
self.snippet = Some(format!("{}($0)", self.label));
}
}
CompletionItemKind::Function
}
_ => return self,
};
self.kind = Some(kind);
self
}
}
impl Into<CompletionItem> for Builder {
fn into(self) -> CompletionItem {
self.build()
}
}
/// Represents an in-progress set of completions being built.
#[derive(Debug, Default)]
pub(crate) struct Completions {
buf: Vec<CompletionItem>,
}
impl Completions {
pub(crate) fn add(&mut self, item: impl Into<CompletionItem>) {
self.buf.push(item.into())
}
pub(crate) fn add_all<I>(&mut self, items: I)
where
I: IntoIterator,
I::Item: Into<CompletionItem>,
{
items.into_iter().for_each(|item| self.add(item.into()))
}
#[cfg(test)]
pub(crate) fn assert_match(&self, expected: &str, kind: CompletionKind) {
let expected = normalize(expected);
let actual = self.debug_render(kind);
test_utils::assert_eq_text!(expected.as_str(), actual.as_str(),);
/// Normalize the textual representation of `Completions`:
/// replace `;` with newlines, normalize whitespace
fn normalize(expected: &str) -> String {
use ra_syntax::{tokenize, TextUnit, TextRange, SyntaxKind::SEMI};
let mut res = String::new();
for line in expected.trim().lines() {
let line = line.trim();
let mut start_offset: TextUnit = 0.into();
// Yep, we use rust tokenize in completion tests :-)
for token in tokenize(line) {
let range = TextRange::offset_len(start_offset, token.len);
start_offset += token.len;
if token.kind == SEMI {
res.push('\n');
} else {
res.push_str(&line[range]);
}
}
res.push('\n');
}
res
}
}
#[cfg(test)]
fn debug_render(&self, kind: CompletionKind) -> String {
let mut res = String::new();
for c in self.buf.iter() {
if c.completion_kind == kind {
if let Some(lookup) = &c.lookup {
res.push_str(lookup);
res.push_str(&format!(" {:?}", c.label));
} else {
res.push_str(&c.label);
}
if let Some(snippet) = &c.snippet {
res.push_str(&format!(" {:?}", snippet));
}
res.push('\n');
}
}
res
}
}
impl Into<Vec<CompletionItem>> for Completions {
fn into(self) -> Vec<CompletionItem> {
self.buf
}
}
|