aboutsummaryrefslogtreecommitdiff
path: root/crates/ra_lsp_server/src/conv.rs
blob: 25749258958c74b2d9aa136b6a7f9e1bff942477 (plain)
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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
use lsp_types::{
    self, CreateFile, Documentation, DocumentChangeOperation, DocumentChanges, Location, LocationLink,
    MarkupContent, MarkupKind, Position, Range, RenameFile, ResourceOp, SymbolKind, TextDocumentEdit, TextDocumentIdentifier,
    TextDocumentItem, TextDocumentPositionParams, Url, VersionedTextDocumentIdentifier,
    WorkspaceEdit,
};
use ra_ide_api::{
    CompletionItem, CompletionItemKind, FileId, FilePosition, FileRange, FileSystemEdit,
    NavigationTarget, SourceChange, SourceFileEdit, RangeInfo,
    LineCol, LineIndex, translate_offset_with_edit, InsertTextFormat
};
use ra_syntax::{SyntaxKind, TextRange, TextUnit};
use ra_text_edit::{AtomTextEdit, TextEdit};

use crate::{req, world::WorldSnapshot, Result};

pub trait Conv {
    type Output;
    fn conv(self) -> Self::Output;
}

pub trait ConvWith {
    type Ctx;
    type Output;
    fn conv_with(self, ctx: &Self::Ctx) -> Self::Output;
}

pub trait TryConvWith {
    type Ctx;
    type Output;
    fn try_conv_with(self, ctx: &Self::Ctx) -> Result<Self::Output>;
}

impl Conv for SyntaxKind {
    type Output = SymbolKind;

    fn conv(self) -> <Self as Conv>::Output {
        match self {
            SyntaxKind::FN_DEF => SymbolKind::Function,
            SyntaxKind::STRUCT_DEF => SymbolKind::Struct,
            SyntaxKind::ENUM_DEF => SymbolKind::Enum,
            SyntaxKind::ENUM_VARIANT => SymbolKind::EnumMember,
            SyntaxKind::TRAIT_DEF => SymbolKind::Interface,
            SyntaxKind::MODULE => SymbolKind::Module,
            SyntaxKind::TYPE_ALIAS_DEF => SymbolKind::TypeParameter,
            SyntaxKind::NAMED_FIELD_DEF => SymbolKind::Field,
            SyntaxKind::STATIC_DEF => SymbolKind::Constant,
            SyntaxKind::CONST_DEF => SymbolKind::Constant,
            SyntaxKind::IMPL_BLOCK => SymbolKind::Object,
            _ => SymbolKind::Variable,
        }
    }
}

impl Conv for CompletionItemKind {
    type Output = ::lsp_types::CompletionItemKind;

    fn conv(self) -> <Self as Conv>::Output {
        use lsp_types::CompletionItemKind::*;
        match self {
            CompletionItemKind::Keyword => Keyword,
            CompletionItemKind::Snippet => Snippet,
            CompletionItemKind::Module => Module,
            CompletionItemKind::Function => Function,
            CompletionItemKind::Struct => Struct,
            CompletionItemKind::Enum => Enum,
            CompletionItemKind::EnumVariant => EnumMember,
            CompletionItemKind::BuiltinType => Struct,
            CompletionItemKind::Binding => Variable,
            CompletionItemKind::Field => Field,
            CompletionItemKind::Trait => Interface,
            CompletionItemKind::TypeAlias => Struct,
            CompletionItemKind::Const => Constant,
            CompletionItemKind::Static => Value,
            CompletionItemKind::Method => Method,
            CompletionItemKind::TypeParam => TypeParameter,
            CompletionItemKind::Macro => Method,
        }
    }
}

impl ConvWith for CompletionItem {
    type Ctx = LineIndex;
    type Output = ::lsp_types::CompletionItem;

    fn conv_with(self, ctx: &LineIndex) -> ::lsp_types::CompletionItem {
        let mut additional_text_edits = Vec::new();
        let mut text_edit = None;
        // LSP does not allow arbitrary edits in completion, so we have to do a
        // non-trivial mapping here.
        for atom_edit in self.text_edit().as_atoms() {
            if self.source_range().is_subrange(&atom_edit.delete) {
                text_edit = Some(if atom_edit.delete == self.source_range() {
                    atom_edit.conv_with(ctx)
                } else {
                    assert!(self.source_range().end() == atom_edit.delete.end());
                    let range1 =
                        TextRange::from_to(atom_edit.delete.start(), self.source_range().start());
                    let range2 = self.source_range();
                    let edit1 = AtomTextEdit::replace(range1, String::new());
                    let edit2 = AtomTextEdit::replace(range2, atom_edit.insert.clone());
                    additional_text_edits.push(edit1.conv_with(ctx));
                    edit2.conv_with(ctx)
                })
            } else {
                assert!(self.source_range().intersection(&atom_edit.delete).is_none());
                additional_text_edits.push(atom_edit.conv_with(ctx));
            }
        }
        let text_edit = text_edit.unwrap();

        let mut res = lsp_types::CompletionItem {
            label: self.label().to_string(),
            detail: self.detail().map(|it| it.to_string()),
            filter_text: Some(self.lookup().to_string()),
            kind: self.kind().map(|it| it.conv()),
            text_edit: Some(text_edit),
            additional_text_edits: Some(additional_text_edits),
            documentation: self.documentation().map(|it| it.conv()),
            ..Default::default()
        };
        res.insert_text_format = Some(match self.insert_text_format() {
            InsertTextFormat::Snippet => lsp_types::InsertTextFormat::Snippet,
            InsertTextFormat::PlainText => lsp_types::InsertTextFormat::PlainText,
        });

        res
    }
}

impl ConvWith for Position {
    type Ctx = LineIndex;
    type Output = TextUnit;

    fn conv_with(self, line_index: &LineIndex) -> TextUnit {
        let line_col = LineCol { line: self.line as u32, col_utf16: self.character as u32 };
        line_index.offset(line_col)
    }
}

impl ConvWith for TextUnit {
    type Ctx = LineIndex;
    type Output = Position;

    fn conv_with(self, line_index: &LineIndex) -> Position {
        let line_col = line_index.line_col(self);
        Position::new(u64::from(line_col.line), u64::from(line_col.col_utf16))
    }
}

impl ConvWith for TextRange {
    type Ctx = LineIndex;
    type Output = Range;

    fn conv_with(self, line_index: &LineIndex) -> Range {
        Range::new(self.start().conv_with(line_index), self.end().conv_with(line_index))
    }
}

impl ConvWith for Range {
    type Ctx = LineIndex;
    type Output = TextRange;

    fn conv_with(self, line_index: &LineIndex) -> TextRange {
        TextRange::from_to(self.start.conv_with(line_index), self.end.conv_with(line_index))
    }
}

impl Conv for ra_ide_api::Documentation {
    type Output = lsp_types::Documentation;
    fn conv(self) -> Documentation {
        Documentation::MarkupContent(MarkupContent {
            kind: MarkupKind::Markdown,
            value: crate::markdown::mark_fenced_blocks_as_rust(self.as_str()).into(),
        })
    }
}

impl Conv for ra_ide_api::FunctionSignature {
    type Output = lsp_types::SignatureInformation;
    fn conv(self) -> Self::Output {
        use lsp_types::{ParameterInformation, ParameterLabel, SignatureInformation};

        let label = self.to_string();

        let documentation = self.doc.map(|it| it.conv());

        let parameters: Vec<ParameterInformation> = self
            .parameters
            .into_iter()
            .map(|param| ParameterInformation {
                label: ParameterLabel::Simple(param),
                documentation: None,
            })
            .collect();

        SignatureInformation { label, documentation, parameters: Some(parameters) }
    }
}

impl ConvWith for TextEdit {
    type Ctx = LineIndex;
    type Output = Vec<lsp_types::TextEdit>;

    fn conv_with(self, line_index: &LineIndex) -> Vec<lsp_types::TextEdit> {
        self.as_atoms().iter().map_conv_with(line_index).collect()
    }
}

impl<'a> ConvWith for &'a AtomTextEdit {
    type Ctx = LineIndex;
    type Output = lsp_types::TextEdit;

    fn conv_with(self, line_index: &LineIndex) -> lsp_types::TextEdit {
        lsp_types::TextEdit {
            range: self.delete.conv_with(line_index),
            new_text: self.insert.clone(),
        }
    }
}

impl<T: ConvWith> ConvWith for Option<T> {
    type Ctx = <T as ConvWith>::Ctx;
    type Output = Option<<T as ConvWith>::Output>;
    fn conv_with(self, ctx: &Self::Ctx) -> Self::Output {
        self.map(|x| ConvWith::conv_with(x, ctx))
    }
}

impl<'a> TryConvWith for &'a Url {
    type Ctx = WorldSnapshot;
    type Output = FileId;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<FileId> {
        world.uri_to_file_id(self)
    }
}

impl TryConvWith for FileId {
    type Ctx = WorldSnapshot;
    type Output = Url;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<Url> {
        world.file_id_to_uri(self)
    }
}

impl<'a> TryConvWith for &'a TextDocumentItem {
    type Ctx = WorldSnapshot;
    type Output = FileId;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<FileId> {
        self.uri.try_conv_with(world)
    }
}

impl<'a> TryConvWith for &'a VersionedTextDocumentIdentifier {
    type Ctx = WorldSnapshot;
    type Output = FileId;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<FileId> {
        self.uri.try_conv_with(world)
    }
}

impl<'a> TryConvWith for &'a TextDocumentIdentifier {
    type Ctx = WorldSnapshot;
    type Output = FileId;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<FileId> {
        world.uri_to_file_id(&self.uri)
    }
}

impl<'a> TryConvWith for &'a TextDocumentPositionParams {
    type Ctx = WorldSnapshot;
    type Output = FilePosition;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<FilePosition> {
        let file_id = self.text_document.try_conv_with(world)?;
        let line_index = world.analysis().file_line_index(file_id);
        let offset = self.position.conv_with(&line_index);
        Ok(FilePosition { file_id, offset })
    }
}

impl<'a> TryConvWith for (&'a TextDocumentIdentifier, Range) {
    type Ctx = WorldSnapshot;
    type Output = FileRange;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<FileRange> {
        let file_id = self.0.try_conv_with(world)?;
        let line_index = world.analysis().file_line_index(file_id);
        let range = self.1.conv_with(&line_index);
        Ok(FileRange { file_id, range })
    }
}

impl<T: TryConvWith> TryConvWith for Vec<T> {
    type Ctx = <T as TryConvWith>::Ctx;
    type Output = Vec<<T as TryConvWith>::Output>;
    fn try_conv_with(self, ctx: &Self::Ctx) -> Result<Self::Output> {
        let mut res = Vec::with_capacity(self.len());
        for item in self {
            res.push(item.try_conv_with(ctx)?);
        }
        Ok(res)
    }
}

impl TryConvWith for SourceChange {
    type Ctx = WorldSnapshot;
    type Output = req::SourceChange;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<req::SourceChange> {
        let cursor_position = match self.cursor_position {
            None => None,
            Some(pos) => {
                let line_index = world.analysis().file_line_index(pos.file_id);
                let edit = self
                    .source_file_edits
                    .iter()
                    .find(|it| it.file_id == pos.file_id)
                    .map(|it| &it.edit);
                let line_col = match edit {
                    Some(edit) => translate_offset_with_edit(&*line_index, pos.offset, edit),
                    None => line_index.line_col(pos.offset),
                };
                let position =
                    Position::new(u64::from(line_col.line), u64::from(line_col.col_utf16));
                Some(TextDocumentPositionParams {
                    text_document: TextDocumentIdentifier::new(pos.file_id.try_conv_with(world)?),
                    position,
                })
            }
        };
        let mut document_changes: Vec<DocumentChangeOperation> = Vec::new();
        for resource_op in self.file_system_edits.try_conv_with(world)? {
            document_changes.push(DocumentChangeOperation::Op(resource_op));
        }
        for text_document_edit in self.source_file_edits.try_conv_with(world)? {
            document_changes.push(DocumentChangeOperation::Edit(text_document_edit));
        }
        let workspace_edit = WorkspaceEdit {
            changes: None,
            document_changes: Some(DocumentChanges::Operations(document_changes)),
        };
        Ok(req::SourceChange { label: self.label, workspace_edit, cursor_position })
    }
}

impl TryConvWith for SourceFileEdit {
    type Ctx = WorldSnapshot;
    type Output = TextDocumentEdit;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<TextDocumentEdit> {
        let text_document = VersionedTextDocumentIdentifier {
            uri: self.file_id.try_conv_with(world)?,
            version: None,
        };
        let line_index = world.analysis().file_line_index(self.file_id);
        let edits = self.edit.as_atoms().iter().map_conv_with(&line_index).collect();
        Ok(TextDocumentEdit { text_document, edits })
    }
}

impl TryConvWith for FileSystemEdit {
    type Ctx = WorldSnapshot;
    type Output = ResourceOp;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<ResourceOp> {
        let res = match self {
            FileSystemEdit::CreateFile { source_root, path } => {
                let uri = world.path_to_uri(source_root, &path)?;
                ResourceOp::Create(CreateFile { uri, options: None })
            }
            FileSystemEdit::MoveFile { src, dst_source_root, dst_path } => {
                let old_uri = world.file_id_to_uri(src)?;
                let new_uri = world.path_to_uri(dst_source_root, &dst_path)?;
                ResourceOp::Rename(RenameFile { old_uri, new_uri, options: None })
            }
        };
        Ok(res)
    }
}

impl TryConvWith for &NavigationTarget {
    type Ctx = WorldSnapshot;
    type Output = Location;
    fn try_conv_with(self, world: &WorldSnapshot) -> Result<Location> {
        let line_index = world.analysis().file_line_index(self.file_id());
        let range = self.range();
        to_location(self.file_id(), range, &world, &line_index)
    }
}

pub fn to_location_link(
    target: &RangeInfo<NavigationTarget>,
    world: &WorldSnapshot,
    // line index for original range file
    line_index: &LineIndex,
) -> Result<LocationLink> {
    let target_uri = target.info.file_id().try_conv_with(world)?;
    let tgt_line_index = world.analysis().file_line_index(target.info.file_id());

    let target_range = target.info.full_range().conv_with(&tgt_line_index);

    let target_selection_range =
        target.info.focus_range().map(|it| it.conv_with(&tgt_line_index)).unwrap_or(target_range);

    let res = LocationLink {
        origin_selection_range: Some(target.range.conv_with(line_index)),
        target_uri,
        target_range,
        target_selection_range,
    };
    Ok(res)
}

pub fn to_location(
    file_id: FileId,
    range: TextRange,
    world: &WorldSnapshot,
    line_index: &LineIndex,
) -> Result<Location> {
    let url = file_id.try_conv_with(world)?;
    let loc = Location::new(url, range.conv_with(line_index));
    Ok(loc)
}

pub trait MapConvWith<'a>: Sized + 'a {
    type Ctx;
    type Output;

    fn map_conv_with(self, ctx: &'a Self::Ctx) -> ConvWithIter<'a, Self, Self::Ctx> {
        ConvWithIter { iter: self, ctx }
    }
}

impl<'a, I> MapConvWith<'a> for I
where
    I: Iterator + 'a,
    I::Item: ConvWith,
{
    type Ctx = <I::Item as ConvWith>::Ctx;
    type Output = <I::Item as ConvWith>::Output;
}

pub struct ConvWithIter<'a, I, Ctx: 'a> {
    iter: I,
    ctx: &'a Ctx,
}

impl<'a, I, Ctx> Iterator for ConvWithIter<'a, I, Ctx>
where
    I: Iterator,
    I::Item: ConvWith<Ctx = Ctx>,
{
    type Item = <I::Item as ConvWith>::Output;

    fn next(&mut self) -> Option<Self::Item> {
        self.iter.next().map(|item| item.conv_with(self.ctx))
    }
}