crates/rust-analyzer/src/to_proto.rs

   1 //! Conversion of rust-analyzer specific types to lsp_types equivalents.
   2 use std::path::{self, Path};
   3
   4 use itertools::Itertools;
   5 use ra_db::{FileId, FileRange};
   6 use ra_ide::{
   7     Assist, CompletionItem, CompletionItemKind, Documentation, FileSystemEdit, Fold, FoldKind,
   8     FunctionSignature, Highlight, HighlightModifier, HighlightTag, HighlightedRange, Indel,
   9     InlayHint, InlayKind, InsertTextFormat, LineIndex, NavigationTarget, ReferenceAccess,
  10     ResolvedAssist, Runnable, Severity, SourceChange, SourceFileEdit, TextEdit,
  11 };
  12 use ra_syntax::{SyntaxKind, TextRange, TextSize};
  13 use ra_vfs::LineEndings;
  14
  15 use crate::{
  16     cargo_target_spec::CargoTargetSpec, global_state::GlobalStateSnapshot, lsp_ext,
  17     semantic_tokens, Result,
  18 };
  19
  20 pub(crate) fn position(line_index: &LineIndex, offset: TextSize) -> lsp_types::Position {
  21     let line_col = line_index.line_col(offset);
  22     let line = u64::from(line_col.line);
  23     let character = u64::from(line_col.col_utf16);
  24     lsp_types::Position::new(line, character)
  25 }
  26
  27 pub(crate) fn range(line_index: &LineIndex, range: TextRange) -> lsp_types::Range {
  28     let start = position(line_index, range.start());
  29     let end = position(line_index, range.end());
  30     lsp_types::Range::new(start, end)
  31 }
  32
  33 pub(crate) fn symbol_kind(syntax_kind: SyntaxKind) -> lsp_types::SymbolKind {
  34     match syntax_kind {
  35         SyntaxKind::FN_DEF => lsp_types::SymbolKind::Function,
  36         SyntaxKind::STRUCT_DEF => lsp_types::SymbolKind::Struct,
  37         SyntaxKind::ENUM_DEF => lsp_types::SymbolKind::Enum,
  38         SyntaxKind::ENUM_VARIANT => lsp_types::SymbolKind::EnumMember,
  39         SyntaxKind::TRAIT_DEF => lsp_types::SymbolKind::Interface,
  40         SyntaxKind::MACRO_CALL => lsp_types::SymbolKind::Function,
  41         SyntaxKind::MODULE => lsp_types::SymbolKind::Module,
  42         SyntaxKind::TYPE_ALIAS_DEF => lsp_types::SymbolKind::TypeParameter,
  43         SyntaxKind::RECORD_FIELD_DEF => lsp_types::SymbolKind::Field,
  44         SyntaxKind::STATIC_DEF => lsp_types::SymbolKind::Constant,
  45         SyntaxKind::CONST_DEF => lsp_types::SymbolKind::Constant,
  46         SyntaxKind::IMPL_DEF => lsp_types::SymbolKind::Object,
  47         _ => lsp_types::SymbolKind::Variable,
  48     }
  49 }
  50
  51 pub(crate) fn document_highlight_kind(
  52     reference_access: ReferenceAccess,
  53 ) -> lsp_types::DocumentHighlightKind {
  54     match reference_access {
  55         ReferenceAccess::Read => lsp_types::DocumentHighlightKind::Read,
  56         ReferenceAccess::Write => lsp_types::DocumentHighlightKind::Write,
  57     }
  58 }
  59
  60 pub(crate) fn diagnostic_severity(severity: Severity) -> lsp_types::DiagnosticSeverity {
  61     match severity {
  62         Severity::Error => lsp_types::DiagnosticSeverity::Error,
  63         Severity::WeakWarning => lsp_types::DiagnosticSeverity::Hint,
  64     }
  65 }
  66
  67 pub(crate) fn documentation(documentation: Documentation) -> lsp_types::Documentation {
  68     let value = crate::markdown::format_docs(documentation.as_str());
  69     let markup_content = lsp_types::MarkupContent { kind: lsp_types::MarkupKind::Markdown, value };
  70     lsp_types::Documentation::MarkupContent(markup_content)
  71 }
  72
  73 pub(crate) fn insert_text_format(
  74     insert_text_format: InsertTextFormat,
  75 ) -> lsp_types::InsertTextFormat {
  76     match insert_text_format {
  77         InsertTextFormat::Snippet => lsp_types::InsertTextFormat::Snippet,
  78         InsertTextFormat::PlainText => lsp_types::InsertTextFormat::PlainText,
  79     }
  80 }
  81
  82 pub(crate) fn completion_item_kind(
  83     completion_item_kind: CompletionItemKind,
  84 ) -> lsp_types::CompletionItemKind {
  85     match completion_item_kind {
  86         CompletionItemKind::Keyword => lsp_types::CompletionItemKind::Keyword,
  87         CompletionItemKind::Snippet => lsp_types::CompletionItemKind::Snippet,
  88         CompletionItemKind::Module => lsp_types::CompletionItemKind::Module,
  89         CompletionItemKind::Function => lsp_types::CompletionItemKind::Function,
  90         CompletionItemKind::Struct => lsp_types::CompletionItemKind::Struct,
  91         CompletionItemKind::Enum => lsp_types::CompletionItemKind::Enum,
  92         CompletionItemKind::EnumVariant => lsp_types::CompletionItemKind::EnumMember,
  93         CompletionItemKind::BuiltinType => lsp_types::CompletionItemKind::Struct,
  94         CompletionItemKind::Binding => lsp_types::CompletionItemKind::Variable,
  95         CompletionItemKind::Field => lsp_types::CompletionItemKind::Field,
  96         CompletionItemKind::Trait => lsp_types::CompletionItemKind::Interface,
  97         CompletionItemKind::TypeAlias => lsp_types::CompletionItemKind::Struct,
  98         CompletionItemKind::Const => lsp_types::CompletionItemKind::Constant,
  99         CompletionItemKind::Static => lsp_types::CompletionItemKind::Value,
 100         CompletionItemKind::Method => lsp_types::CompletionItemKind::Method,
 101         CompletionItemKind::TypeParam => lsp_types::CompletionItemKind::TypeParameter,
 102         CompletionItemKind::Macro => lsp_types::CompletionItemKind::Method,
 103         CompletionItemKind::Attribute => lsp_types::CompletionItemKind::EnumMember,
 104     }
 105 }
 106
 107 pub(crate) fn text_edit(
 108     line_index: &LineIndex,
 109     line_endings: LineEndings,
 110     indel: Indel,
 111 ) -> lsp_types::TextEdit {
 112     let range = range(line_index, indel.delete);
 113     let new_text = match line_endings {
 114         LineEndings::Unix => indel.insert,
 115         LineEndings::Dos => indel.insert.replace('\n', "\r\n"),
 116     };
 117     lsp_types::TextEdit { range, new_text }
 118 }
 119
 120 pub(crate) fn snippet_text_edit(
 121     line_index: &LineIndex,
 122     line_endings: LineEndings,
 123     is_snippet: bool,
 124     indel: Indel,
 125 ) -> lsp_ext::SnippetTextEdit {
 126     let text_edit = text_edit(line_index, line_endings, indel);
 127     let insert_text_format =
 128         if is_snippet { Some(lsp_types::InsertTextFormat::Snippet) } else { None };
 129     lsp_ext::SnippetTextEdit {
 130         range: text_edit.range,
 131         new_text: text_edit.new_text,
 132         insert_text_format,
 133     }
 134 }
 135
 136 pub(crate) fn text_edit_vec(
 137     line_index: &LineIndex,
 138     line_endings: LineEndings,
 139     text_edit: TextEdit,
 140 ) -> Vec<lsp_types::TextEdit> {
 141     text_edit.into_iter().map(|indel| self::text_edit(line_index, line_endings, indel)).collect()
 142 }
 143
 144 pub(crate) fn snippet_text_edit_vec(
 145     line_index: &LineIndex,
 146     line_endings: LineEndings,
 147     is_snippet: bool,
 148     text_edit: TextEdit,
 149 ) -> Vec<lsp_ext::SnippetTextEdit> {
 150     text_edit
 151         .into_iter()
 152         .map(|indel| self::snippet_text_edit(line_index, line_endings, is_snippet, indel))
 153         .collect()
 154 }
 155
 156 pub(crate) fn completion_item(
 157     line_index: &LineIndex,
 158     line_endings: LineEndings,
 159     completion_item: CompletionItem,
 160 ) -> lsp_types::CompletionItem {
 161     let mut additional_text_edits = Vec::new();
 162     let mut text_edit = None;
 163     // LSP does not allow arbitrary edits in completion, so we have to do a
 164     // non-trivial mapping here.
 165     let source_range = completion_item.source_range();
 166     for indel in completion_item.text_edit().iter() {
 167         if indel.delete.contains_range(source_range) {
 168             text_edit = Some(if indel.delete == source_range {
 169                 self::text_edit(line_index, line_endings, indel.clone())
 170             } else {
 171                 assert!(source_range.end() == indel.delete.end());
 172                 let range1 = TextRange::new(indel.delete.start(), source_range.start());
 173                 let range2 = source_range;
 174                 let indel1 = Indel::replace(range1, String::new());
 175                 let indel2 = Indel::replace(range2, indel.insert.clone());
 176                 additional_text_edits.push(self::text_edit(line_index, line_endings, indel1));
 177                 self::text_edit(line_index, line_endings, indel2)
 178             })
 179         } else {
 180             assert!(source_range.intersect(indel.delete).is_none());
 181             let text_edit = self::text_edit(line_index, line_endings, indel.clone());
 182             additional_text_edits.push(text_edit);
 183         }
 184     }
 185     let text_edit = text_edit.unwrap();
 186
 187     let mut res = lsp_types::CompletionItem {
 188         label: completion_item.label().to_string(),
 189         detail: completion_item.detail().map(|it| it.to_string()),
 190         filter_text: Some(completion_item.lookup().to_string()),
 191         kind: completion_item.kind().map(completion_item_kind),
 192         text_edit: Some(text_edit.into()),
 193         additional_text_edits: Some(additional_text_edits),
 194         documentation: completion_item.documentation().map(documentation),
 195         deprecated: Some(completion_item.deprecated()),
 196         ..Default::default()
 197     };
 198
 199     if completion_item.score().is_some() {
 200         res.preselect = Some(true);
 201         // HACK: sort preselect items first
 202         res.sort_text = Some(format!(" {}", completion_item.label()));
 203     }
 204
 205     if completion_item.deprecated() {
 206         res.tags = Some(vec![lsp_types::CompletionItemTag::Deprecated])
 207     }
 208
 209     if completion_item.trigger_call_info() {
 210         res.command = Some(lsp_types::Command {
 211             title: "triggerParameterHints".into(),
 212             command: "editor.action.triggerParameterHints".into(),
 213             arguments: None,
 214         });
 215     }
 216
 217     res.insert_text_format = Some(insert_text_format(completion_item.insert_text_format()));
 218
 219     res
 220 }
 221
 222 pub(crate) fn signature_information(
 223     signature: FunctionSignature,
 224     concise: bool,
 225 ) -> lsp_types::SignatureInformation {
 226     let (label, documentation, params) = if concise {
 227         let mut params = signature.parameters;
 228         if signature.has_self_param {
 229             params.remove(0);
 230         }
 231         (params.join(", "), None, params)
 232     } else {
 233         (signature.to_string(), signature.doc.map(documentation), signature.parameters)
 234     };
 235
 236     let parameters: Vec<lsp_types::ParameterInformation> = params
 237         .into_iter()
 238         .map(|param| lsp_types::ParameterInformation {
 239             label: lsp_types::ParameterLabel::Simple(param),
 240             documentation: None,
 241         })
 242         .collect();
 243
 244     lsp_types::SignatureInformation { label, documentation, parameters: Some(parameters) }
 245 }
 246
 247 pub(crate) fn inlay_int(line_index: &LineIndex, inlay_hint: InlayHint) -> lsp_ext::InlayHint {
 248     lsp_ext::InlayHint {
 249         label: inlay_hint.label.to_string(),
 250         range: range(line_index, inlay_hint.range),
 251         kind: match inlay_hint.kind {
 252             InlayKind::ParameterHint => lsp_ext::InlayKind::ParameterHint,
 253             InlayKind::TypeHint => lsp_ext::InlayKind::TypeHint,
 254             InlayKind::ChainingHint => lsp_ext::InlayKind::ChainingHint,
 255         },
 256     }
 257 }
 258
 259 pub(crate) fn semantic_tokens(
 260     text: &str,
 261     line_index: &LineIndex,
 262     highlights: Vec<HighlightedRange>,
 263 ) -> lsp_types::SemanticTokens {
 264     let mut builder = semantic_tokens::SemanticTokensBuilder::default();
 265
 266     for highlight_range in highlights {
 267         let (type_, mods) = semantic_token_type_and_modifiers(highlight_range.highlight);
 268         let token_index = semantic_tokens::type_index(type_);
 269         let modifier_bitset = mods.0;
 270
 271         for mut text_range in line_index.lines(highlight_range.range) {
 272             if text[text_range].ends_with('\n') {
 273                 text_range =
 274                     TextRange::new(text_range.start(), text_range.end() - TextSize::of('\n'));
 275             }
 276             let range = range(&line_index, text_range);
 277             builder.push(range, token_index, modifier_bitset);
 278         }
 279     }
 280
 281     builder.build()
 282 }
 283
 284 fn semantic_token_type_and_modifiers(
 285     highlight: Highlight,
 286 ) -> (lsp_types::SemanticTokenType, semantic_tokens::ModifierSet) {
 287     let mut mods = semantic_tokens::ModifierSet::default();
 288     let type_ = match highlight.tag {
 289         HighlightTag::Struct => lsp_types::SemanticTokenType::STRUCT,
 290         HighlightTag::Enum => lsp_types::SemanticTokenType::ENUM,
 291         HighlightTag::Union => semantic_tokens::UNION,
 292         HighlightTag::TypeAlias => semantic_tokens::TYPE_ALIAS,
 293         HighlightTag::Trait => lsp_types::SemanticTokenType::INTERFACE,
 294         HighlightTag::BuiltinType => semantic_tokens::BUILTIN_TYPE,
 295         HighlightTag::SelfKeyword => semantic_tokens::SELF_KEYWORD,
 296         HighlightTag::SelfType => lsp_types::SemanticTokenType::TYPE,
 297         HighlightTag::Field => lsp_types::SemanticTokenType::PROPERTY,
 298         HighlightTag::Function => lsp_types::SemanticTokenType::FUNCTION,
 299         HighlightTag::Module => lsp_types::SemanticTokenType::NAMESPACE,
 300         HighlightTag::Constant => {
 301             mods |= semantic_tokens::CONSTANT;
 302             mods |= lsp_types::SemanticTokenModifier::STATIC;
 303             lsp_types::SemanticTokenType::VARIABLE
 304         }
 305         HighlightTag::Static => {
 306             mods |= lsp_types::SemanticTokenModifier::STATIC;
 307             lsp_types::SemanticTokenType::VARIABLE
 308         }
 309         HighlightTag::EnumVariant => semantic_tokens::ENUM_MEMBER,
 310         HighlightTag::Macro => lsp_types::SemanticTokenType::MACRO,
 311         HighlightTag::Local => lsp_types::SemanticTokenType::VARIABLE,
 312         HighlightTag::TypeParam => lsp_types::SemanticTokenType::TYPE_PARAMETER,
 313         HighlightTag::Lifetime => semantic_tokens::LIFETIME,
 314         HighlightTag::ByteLiteral | HighlightTag::NumericLiteral => {
 315             lsp_types::SemanticTokenType::NUMBER
 316         }
 317         HighlightTag::BoolLiteral => semantic_tokens::BOOLEAN,
 318         HighlightTag::CharLiteral | HighlightTag::StringLiteral => {
 319             lsp_types::SemanticTokenType::STRING
 320         }
 321         HighlightTag::Comment => lsp_types::SemanticTokenType::COMMENT,
 322         HighlightTag::Attribute => semantic_tokens::ATTRIBUTE,
 323         HighlightTag::Keyword => lsp_types::SemanticTokenType::KEYWORD,
 324         HighlightTag::UnresolvedReference => semantic_tokens::UNRESOLVED_REFERENCE,
 325         HighlightTag::FormatSpecifier => semantic_tokens::FORMAT_SPECIFIER,
 326         HighlightTag::Operator => lsp_types::SemanticTokenType::OPERATOR,
 327         HighlightTag::EscapeSequence => semantic_tokens::ESCAPE_SEQUENCE,
 328     };
 329
 330     for modifier in highlight.modifiers.iter() {
 331         let modifier = match modifier {
 332             HighlightModifier::Attribute => semantic_tokens::ATTRIBUTE_MODIFIER,
 333             HighlightModifier::Definition => lsp_types::SemanticTokenModifier::DECLARATION,
 334             HighlightModifier::Documentation => lsp_types::SemanticTokenModifier::DOCUMENTATION,
 335             HighlightModifier::ControlFlow => semantic_tokens::CONTROL_FLOW,
 336             HighlightModifier::Mutable => semantic_tokens::MUTABLE,
 337             HighlightModifier::Unsafe => semantic_tokens::UNSAFE,
 338         };
 339         mods |= modifier;
 340     }
 341
 342     (type_, mods)
 343 }
 344
 345 pub(crate) fn folding_range(
 346     text: &str,
 347     line_index: &LineIndex,
 348     line_folding_only: bool,
 349     fold: Fold,
 350 ) -> lsp_types::FoldingRange {
 351     let kind = match fold.kind {
 352         FoldKind::Comment => Some(lsp_types::FoldingRangeKind::Comment),
 353         FoldKind::Imports => Some(lsp_types::FoldingRangeKind::Imports),
 354         FoldKind::Mods | FoldKind::Block => None,
 355     };
 356
 357     let range = range(line_index, fold.range);
 358
 359     if line_folding_only {
 360         // Clients with line_folding_only == true (such as VSCode) will fold the whole end line
 361         // even if it contains text not in the folding range. To prevent that we exclude
 362         // range.end.line from the folding region if there is more text after range.end
 363         // on the same line.
 364         let has_more_text_on_end_line = text[TextRange::new(fold.range.end(), TextSize::of(text))]
 365             .chars()
 366             .take_while(|it| *it != '\n')
 367             .any(|it| !it.is_whitespace());
 368
 369         let end_line = if has_more_text_on_end_line {
 370             range.end.line.saturating_sub(1)
 371         } else {
 372             range.end.line
 373         };
 374
 375         lsp_types::FoldingRange {
 376             start_line: range.start.line,
 377             start_character: None,
 378             end_line,
 379             end_character: None,
 380             kind,
 381         }
 382     } else {
 383         lsp_types::FoldingRange {
 384             start_line: range.start.line,
 385             start_character: Some(range.start.character),
 386             end_line: range.end.line,
 387             end_character: Some(range.end.character),
 388             kind,
 389         }
 390     }
 391 }
 392
 393 pub(crate) fn url(snap: &GlobalStateSnapshot, file_id: FileId) -> lsp_types::Url {
 394     snap.file_id_to_url(file_id)
 395 }
 396
 397 /// Returns a `Url` object from a given path, will lowercase drive letters if present.
 398 /// This will only happen when processing windows paths.
 399 ///
 400 /// When processing non-windows path, this is essentially the same as `Url::from_file_path`.
 401 pub(crate) fn url_from_abs_path(path: &Path) -> lsp_types::Url {
 402     assert!(path.is_absolute());
 403     let url = lsp_types::Url::from_file_path(path).unwrap();
 404     match path.components().next() {
 405         Some(path::Component::Prefix(prefix)) if matches!(prefix.kind(), path::Prefix::Disk(_) | path::Prefix::VerbatimDisk(_)) =>
 406         {
 407             // Need to lowercase driver letter
 408         }
 409         _ => return url,
 410     }
 411
 412     let driver_letter_range = {
 413         let (scheme, drive_letter, _rest) = match url.as_str().splitn(3, ':').collect_tuple() {
 414             Some(it) => it,
 415             None => return url,
 416         };
 417         let start = scheme.len() + ':'.len_utf8();
 418         start..(start + drive_letter.len())
 419     };
 420
 421     // Note: lowercasing the `path` itself doesn't help, the `Url::parse`
 422     // machinery *also* canonicalizes the drive letter. So, just massage the
 423     // string in place.
 424     let mut url = url.into_string();
 425     url[driver_letter_range].make_ascii_lowercase();
 426     lsp_types::Url::parse(&url).unwrap()
 427 }
 428
 429 pub(crate) fn versioned_text_document_identifier(
 430     snap: &GlobalStateSnapshot,
 431     file_id: FileId,
 432     version: Option<i64>,
 433 ) -> lsp_types::VersionedTextDocumentIdentifier {
 434     lsp_types::VersionedTextDocumentIdentifier { uri: url(snap, file_id), version }
 435 }
 436
 437 pub(crate) fn location(
 438     snap: &GlobalStateSnapshot,
 439     frange: FileRange,
 440 ) -> Result<lsp_types::Location> {
 441     let url = url(snap, frange.file_id);
 442     let line_index = snap.analysis().file_line_index(frange.file_id)?;
 443     let range = range(&line_index, frange.range);
 444     let loc = lsp_types::Location::new(url, range);
 445     Ok(loc)
 446 }
 447
 448 pub(crate) fn location_link(
 449     snap: &GlobalStateSnapshot,
 450     src: Option<FileRange>,
 451     target: NavigationTarget,
 452 ) -> Result<lsp_types::LocationLink> {
 453     let origin_selection_range = match src {
 454         Some(src) => {
 455             let line_index = snap.analysis().file_line_index(src.file_id)?;
 456             let range = range(&line_index, src.range);
 457             Some(range)
 458         }
 459         None => None,
 460     };
 461     let (target_uri, target_range, target_selection_range) = location_info(snap, target)?;
 462     let res = lsp_types::LocationLink {
 463         origin_selection_range,
 464         target_uri,
 465         target_range,
 466         target_selection_range,
 467     };
 468     Ok(res)
 469 }
 470
 471 fn location_info(
 472     snap: &GlobalStateSnapshot,
 473     target: NavigationTarget,
 474 ) -> Result<(lsp_types::Url, lsp_types::Range, lsp_types::Range)> {
 475     let line_index = snap.analysis().file_line_index(target.file_id())?;
 476
 477     let target_uri = url(snap, target.file_id());
 478     let target_range = range(&line_index, target.full_range());
 479     let target_selection_range =
 480         target.focus_range().map(|it| range(&line_index, it)).unwrap_or(target_range);
 481     Ok((target_uri, target_range, target_selection_range))
 482 }
 483
 484 pub(crate) fn goto_definition_response(
 485     snap: &GlobalStateSnapshot,
 486     src: Option<FileRange>,
 487     targets: Vec<NavigationTarget>,
 488 ) -> Result<lsp_types::GotoDefinitionResponse> {
 489     if snap.config.client_caps.location_link {
 490         let links = targets
 491             .into_iter()
 492             .map(|nav| location_link(snap, src, nav))
 493             .collect::<Result<Vec<_>>>()?;
 494         Ok(links.into())
 495     } else {
 496         let locations = targets
 497             .into_iter()
 498             .map(|nav| {
 499                 location(
 500                     snap,
 501                     FileRange {
 502                         file_id: nav.file_id(),
 503                         range: nav.focus_range().unwrap_or(nav.range()),
 504                     },
 505                 )
 506             })
 507             .collect::<Result<Vec<_>>>()?;
 508         Ok(locations.into())
 509     }
 510 }
 511
 512 pub(crate) fn snippet_text_document_edit(
 513     snap: &GlobalStateSnapshot,
 514     is_snippet: bool,
 515     source_file_edit: SourceFileEdit,
 516 ) -> Result<lsp_ext::SnippetTextDocumentEdit> {
 517     let text_document = versioned_text_document_identifier(snap, source_file_edit.file_id, None);
 518     let line_index = snap.analysis().file_line_index(source_file_edit.file_id)?;
 519     let line_endings = snap.file_line_endings(source_file_edit.file_id);
 520     let edits = source_file_edit
 521         .edit
 522         .into_iter()
 523         .map(|it| snippet_text_edit(&line_index, line_endings, is_snippet, it))
 524         .collect();
 525     Ok(lsp_ext::SnippetTextDocumentEdit { text_document, edits })
 526 }
 527
 528 pub(crate) fn resource_op(
 529     snap: &GlobalStateSnapshot,
 530     file_system_edit: FileSystemEdit,
 531 ) -> lsp_types::ResourceOp {
 532     match file_system_edit {
 533         FileSystemEdit::CreateFile { anchor, dst } => {
 534             let uri = snap.anchored_path(anchor, &dst);
 535             lsp_types::ResourceOp::Create(lsp_types::CreateFile { uri, options: None })
 536         }
 537         FileSystemEdit::MoveFile { src, anchor, dst } => {
 538             let old_uri = snap.file_id_to_url(src);
 539             let new_uri = snap.anchored_path(anchor, &dst);
 540             lsp_types::ResourceOp::Rename(lsp_types::RenameFile { old_uri, new_uri, options: None })
 541         }
 542     }
 543 }
 544
 545 pub(crate) fn snippet_workspace_edit(
 546     snap: &GlobalStateSnapshot,
 547     source_change: SourceChange,
 548 ) -> Result<lsp_ext::SnippetWorkspaceEdit> {
 549     let mut document_changes: Vec<lsp_ext::SnippetDocumentChangeOperation> = Vec::new();
 550     for op in source_change.file_system_edits {
 551         let op = resource_op(&snap, op);
 552         document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Op(op));
 553     }
 554     for edit in source_change.source_file_edits {
 555         let edit = snippet_text_document_edit(&snap, source_change.is_snippet, edit)?;
 556         document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Edit(edit));
 557     }
 558     let workspace_edit =
 559         lsp_ext::SnippetWorkspaceEdit { changes: None, document_changes: Some(document_changes) };
 560     Ok(workspace_edit)
 561 }
 562
 563 pub(crate) fn workspace_edit(
 564     snap: &GlobalStateSnapshot,
 565     source_change: SourceChange,
 566 ) -> Result<lsp_types::WorkspaceEdit> {
 567     assert!(!source_change.is_snippet);
 568     snippet_workspace_edit(snap, source_change).map(|it| it.into())
 569 }
 570
 571 impl From<lsp_ext::SnippetWorkspaceEdit> for lsp_types::WorkspaceEdit {
 572     fn from(snippet_workspace_edit: lsp_ext::SnippetWorkspaceEdit) -> lsp_types::WorkspaceEdit {
 573         lsp_types::WorkspaceEdit {
 574             changes: None,
 575             document_changes: snippet_workspace_edit.document_changes.map(|changes| {
 576                 lsp_types::DocumentChanges::Operations(
 577                     changes
 578                         .into_iter()
 579                         .map(|change| match change {
 580                             lsp_ext::SnippetDocumentChangeOperation::Op(op) => {
 581                                 lsp_types::DocumentChangeOperation::Op(op)
 582                             }
 583                             lsp_ext::SnippetDocumentChangeOperation::Edit(edit) => {
 584                                 lsp_types::DocumentChangeOperation::Edit(
 585                                     lsp_types::TextDocumentEdit {
 586                                         text_document: edit.text_document,
 587                                         edits: edit
 588                                             .edits
 589                                             .into_iter()
 590                                             .map(|edit| lsp_types::TextEdit {
 591                                                 range: edit.range,
 592                                                 new_text: edit.new_text,
 593                                             })
 594                                             .collect(),
 595                                     },
 596                                 )
 597                             }
 598                         })
 599                         .collect(),
 600                 )
 601             }),
 602         }
 603     }
 604 }
 605
 606 pub(crate) fn call_hierarchy_item(
 607     snap: &GlobalStateSnapshot,
 608     target: NavigationTarget,
 609 ) -> Result<lsp_types::CallHierarchyItem> {
 610     let name = target.name().to_string();
 611     let detail = target.description().map(|it| it.to_string());
 612     let kind = symbol_kind(target.kind());
 613     let (uri, range, selection_range) = location_info(snap, target)?;
 614     Ok(lsp_types::CallHierarchyItem { name, kind, tags: None, detail, uri, range, selection_range })
 615 }
 616
 617 pub(crate) fn unresolved_code_action(
 618     snap: &GlobalStateSnapshot,
 619     assist: Assist,
 620     index: usize,
 621 ) -> Result<lsp_ext::CodeAction> {
 622     let res = lsp_ext::CodeAction {
 623         title: assist.label,
 624         id: Some(format!("{}:{}", assist.id.0.to_owned(), index.to_string())),
 625         group: assist.group.filter(|_| snap.config.client_caps.code_action_group).map(|gr| gr.0),
 626         kind: Some(String::new()),
 627         edit: None,
 628         command: None,
 629     };
 630     Ok(res)
 631 }
 632
 633 pub(crate) fn resolved_code_action(
 634     snap: &GlobalStateSnapshot,
 635     assist: ResolvedAssist,
 636 ) -> Result<lsp_ext::CodeAction> {
 637     let change = assist.source_change;
 638     unresolved_code_action(snap, assist.assist, 0).and_then(|it| {
 639         Ok(lsp_ext::CodeAction {
 640             id: None,
 641             edit: Some(snippet_workspace_edit(snap, change)?),
 642             ..it
 643         })
 644     })
 645 }
 646
 647 pub(crate) fn runnable(
 648     snap: &GlobalStateSnapshot,
 649     file_id: FileId,
 650     runnable: Runnable,
 651 ) -> Result<lsp_ext::Runnable> {
 652     let spec = CargoTargetSpec::for_file(snap, file_id)?;
 653     let target = spec.as_ref().map(|s| s.target.clone());
 654     let (cargo_args, executable_args) =
 655         CargoTargetSpec::runnable_args(spec, &runnable.kind, &runnable.cfg_exprs)?;
 656     let label = runnable.label(target);
 657     let location = location_link(snap, None, runnable.nav)?;
 658
 659     Ok(lsp_ext::Runnable {
 660         label,
 661         location: Some(location),
 662         kind: lsp_ext::RunnableKind::Cargo,
 663         args: lsp_ext::CargoRunnable {
 664             workspace_root: snap.workspace_root_for(file_id).map(|root| root.to_owned()),
 665             cargo_args,
 666             executable_args,
 667         },
 668     })
 669 }
 670
 671 #[cfg(test)]
 672 mod tests {
 673     use test_utils::extract_ranges;
 674
 675     use super::*;
 676
 677     #[test]
 678     fn conv_fold_line_folding_only_fixup() {
 679         let text = r#"<fold>mod a;
 680 mod b;
 681 mod c;</fold>
 682
 683 fn main() <fold>{
 684     if cond <fold>{
 685         a::do_a();
 686     }</fold> else <fold>{
 687         b::do_b();
 688     }</fold>
 689 }</fold>"#;
 690
 691         let (ranges, text) = extract_ranges(text, "fold");
 692         assert_eq!(ranges.len(), 4);
 693         let folds = vec![
 694             Fold { range: ranges[0], kind: FoldKind::Mods },
 695             Fold { range: ranges[1], kind: FoldKind::Block },
 696             Fold { range: ranges[2], kind: FoldKind::Block },
 697             Fold { range: ranges[3], kind: FoldKind::Block },
 698         ];
 699
 700         let line_index = LineIndex::new(&text);
 701         let converted: Vec<lsp_types::FoldingRange> =
 702             folds.into_iter().map(|it| folding_range(&text, &line_index, true, it)).collect();
 703
 704         let expected_lines = [(0, 2), (4, 10), (5, 6), (7, 9)];
 705         assert_eq!(converted.len(), expected_lines.len());
 706         for (folding_range, (start_line, end_line)) in converted.iter().zip(expected_lines.iter()) {
 707             assert_eq!(folding_range.start_line, *start_line);
 708             assert_eq!(folding_range.start_character, None);
 709             assert_eq!(folding_range.end_line, *end_line);
 710             assert_eq!(folding_range.end_character, None);
 711         }
 712     }
 713
 714     // `Url` is not able to parse windows paths on unix machines.
 715     #[test]
 716     #[cfg(target_os = "windows")]
 717     fn test_lowercase_drive_letter_with_drive() {
 718         let url = url_from_abs_path(Path::new("C:\\Test"));
 719         assert_eq!(url.to_string(), "file:///c:/Test");
 720     }
 721
 722     #[test]
 723     #[cfg(target_os = "windows")]
 724     fn test_drive_without_colon_passthrough() {
 725         let url = url_from_abs_path(Path::new(r#"\\localhost\C$\my_dir"#));
 726         assert_eq!(url.to_string(), "file://localhost/C$/my_dir");
 727     }
 728 }