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
  14 use crate::{
  15     cargo_target_spec::CargoTargetSpec, global_state::GlobalStateSnapshot,
  16     line_endings::LineEndings, lsp_ext, semantic_tokens, Result,
  17 };
  18
  19 pub(crate) fn position(line_index: &LineIndex, offset: TextSize) -> lsp_types::Position {
  20     let line_col = line_index.line_col(offset);
  21     let line = u64::from(line_col.line);
  22     let character = u64::from(line_col.col_utf16);
  23     lsp_types::Position::new(line, character)
  24 }
  25
  26 pub(crate) fn range(line_index: &LineIndex, range: TextRange) -> lsp_types::Range {
  27     let start = position(line_index, range.start());
  28     let end = position(line_index, range.end());
  29     lsp_types::Range::new(start, end)
  30 }
  31
  32 pub(crate) fn symbol_kind(syntax_kind: SyntaxKind) -> lsp_types::SymbolKind {
  33     match syntax_kind {
  34         SyntaxKind::FN_DEF => lsp_types::SymbolKind::Function,
  35         SyntaxKind::STRUCT_DEF => lsp_types::SymbolKind::Struct,
  36         SyntaxKind::ENUM_DEF => lsp_types::SymbolKind::Enum,
  37         SyntaxKind::ENUM_VARIANT => lsp_types::SymbolKind::EnumMember,
  38         SyntaxKind::TRAIT_DEF => lsp_types::SymbolKind::Interface,
  39         SyntaxKind::MACRO_CALL => lsp_types::SymbolKind::Function,
  40         SyntaxKind::MODULE => lsp_types::SymbolKind::Module,
  41         SyntaxKind::TYPE_ALIAS_DEF => lsp_types::SymbolKind::TypeParameter,
  42         SyntaxKind::RECORD_FIELD_DEF => lsp_types::SymbolKind::Field,
  43         SyntaxKind::STATIC_DEF => lsp_types::SymbolKind::Constant,
  44         SyntaxKind::CONST_DEF => lsp_types::SymbolKind::Constant,
  45         SyntaxKind::IMPL_DEF => lsp_types::SymbolKind::Object,
  46         _ => lsp_types::SymbolKind::Variable,
  47     }
  48 }
  49
  50 pub(crate) fn document_highlight_kind(
  51     reference_access: ReferenceAccess,
  52 ) -> lsp_types::DocumentHighlightKind {
  53     match reference_access {
  54         ReferenceAccess::Read => lsp_types::DocumentHighlightKind::Read,
  55         ReferenceAccess::Write => lsp_types::DocumentHighlightKind::Write,
  56     }
  57 }
  58
  59 pub(crate) fn diagnostic_severity(severity: Severity) -> lsp_types::DiagnosticSeverity {
  60     match severity {
  61         Severity::Error => lsp_types::DiagnosticSeverity::Error,
  62         Severity::WeakWarning => lsp_types::DiagnosticSeverity::Hint,
  63     }
  64 }
  65
  66 pub(crate) fn documentation(documentation: Documentation) -> lsp_types::Documentation {
  67     let value = crate::markdown::format_docs(documentation.as_str());
  68     let markup_content = lsp_types::MarkupContent { kind: lsp_types::MarkupKind::Markdown, value };
  69     lsp_types::Documentation::MarkupContent(markup_content)
  70 }
  71
  72 pub(crate) fn insert_text_format(
  73     insert_text_format: InsertTextFormat,
  74 ) -> lsp_types::InsertTextFormat {
  75     match insert_text_format {
  76         InsertTextFormat::Snippet => lsp_types::InsertTextFormat::Snippet,
  77         InsertTextFormat::PlainText => lsp_types::InsertTextFormat::PlainText,
  78     }
  79 }
  80
  81 pub(crate) fn completion_item_kind(
  82     completion_item_kind: CompletionItemKind,
  83 ) -> lsp_types::CompletionItemKind {
  84     match completion_item_kind {
  85         CompletionItemKind::Keyword => lsp_types::CompletionItemKind::Keyword,
  86         CompletionItemKind::Snippet => lsp_types::CompletionItemKind::Snippet,
  87         CompletionItemKind::Module => lsp_types::CompletionItemKind::Module,
  88         CompletionItemKind::Function => lsp_types::CompletionItemKind::Function,
  89         CompletionItemKind::Struct => lsp_types::CompletionItemKind::Struct,
  90         CompletionItemKind::Enum => lsp_types::CompletionItemKind::Enum,
  91         CompletionItemKind::EnumVariant => lsp_types::CompletionItemKind::EnumMember,
  92         CompletionItemKind::BuiltinType => lsp_types::CompletionItemKind::Struct,
  93         CompletionItemKind::Binding => lsp_types::CompletionItemKind::Variable,
  94         CompletionItemKind::Field => lsp_types::CompletionItemKind::Field,
  95         CompletionItemKind::Trait => lsp_types::CompletionItemKind::Interface,
  96         CompletionItemKind::TypeAlias => lsp_types::CompletionItemKind::Struct,
  97         CompletionItemKind::Const => lsp_types::CompletionItemKind::Constant,
  98         CompletionItemKind::Static => lsp_types::CompletionItemKind::Value,
  99         CompletionItemKind::Method => lsp_types::CompletionItemKind::Method,
 100         CompletionItemKind::TypeParam => lsp_types::CompletionItemKind::TypeParameter,
 101         CompletionItemKind::Macro => lsp_types::CompletionItemKind::Method,
 102         CompletionItemKind::Attribute => lsp_types::CompletionItemKind::EnumMember,
 103     }
 104 }
 105
 106 pub(crate) fn text_edit(
 107     line_index: &LineIndex,
 108     line_endings: LineEndings,
 109     indel: Indel,
 110 ) -> lsp_types::TextEdit {
 111     let range = range(line_index, indel.delete);
 112     let new_text = match line_endings {
 113         LineEndings::Unix => indel.insert,
 114         LineEndings::Dos => indel.insert.replace('\n', "\r\n"),
 115     };
 116     lsp_types::TextEdit { range, new_text }
 117 }
 118
 119 pub(crate) fn snippet_text_edit(
 120     line_index: &LineIndex,
 121     line_endings: LineEndings,
 122     is_snippet: bool,
 123     indel: Indel,
 124 ) -> lsp_ext::SnippetTextEdit {
 125     let text_edit = text_edit(line_index, line_endings, indel);
 126     let insert_text_format =
 127         if is_snippet { Some(lsp_types::InsertTextFormat::Snippet) } else { None };
 128     lsp_ext::SnippetTextEdit {
 129         range: text_edit.range,
 130         new_text: text_edit.new_text,
 131         insert_text_format,
 132     }
 133 }
 134
 135 pub(crate) fn text_edit_vec(
 136     line_index: &LineIndex,
 137     line_endings: LineEndings,
 138     text_edit: TextEdit,
 139 ) -> Vec<lsp_types::TextEdit> {
 140     text_edit.into_iter().map(|indel| self::text_edit(line_index, line_endings, indel)).collect()
 141 }
 142
 143 pub(crate) fn snippet_text_edit_vec(
 144     line_index: &LineIndex,
 145     line_endings: LineEndings,
 146     is_snippet: bool,
 147     text_edit: TextEdit,
 148 ) -> Vec<lsp_ext::SnippetTextEdit> {
 149     text_edit
 150         .into_iter()
 151         .map(|indel| self::snippet_text_edit(line_index, line_endings, is_snippet, indel))
 152         .collect()
 153 }
 154
 155 pub(crate) fn completion_item(
 156     line_index: &LineIndex,
 157     line_endings: LineEndings,
 158     completion_item: CompletionItem,
 159 ) -> lsp_types::CompletionItem {
 160     let mut additional_text_edits = Vec::new();
 161     let mut text_edit = None;
 162     // LSP does not allow arbitrary edits in completion, so we have to do a
 163     // non-trivial mapping here.
 164     let source_range = completion_item.source_range();
 165     for indel in completion_item.text_edit().iter() {
 166         if indel.delete.contains_range(source_range) {
 167             text_edit = Some(if indel.delete == source_range {
 168                 self::text_edit(line_index, line_endings, indel.clone())
 169             } else {
 170                 assert!(source_range.end() == indel.delete.end());
 171                 let range1 = TextRange::new(indel.delete.start(), source_range.start());
 172                 let range2 = source_range;
 173                 let indel1 = Indel::replace(range1, String::new());
 174                 let indel2 = Indel::replace(range2, indel.insert.clone());
 175                 additional_text_edits.push(self::text_edit(line_index, line_endings, indel1));
 176                 self::text_edit(line_index, line_endings, indel2)
 177             })
 178         } else {
 179             assert!(source_range.intersect(indel.delete).is_none());
 180             let text_edit = self::text_edit(line_index, line_endings, indel.clone());
 181             additional_text_edits.push(text_edit);
 182         }
 183     }
 184     let text_edit = text_edit.unwrap();
 185
 186     let mut res = lsp_types::CompletionItem {
 187         label: completion_item.label().to_string(),
 188         detail: completion_item.detail().map(|it| it.to_string()),
 189         filter_text: Some(completion_item.lookup().to_string()),
 190         kind: completion_item.kind().map(completion_item_kind),
 191         text_edit: Some(text_edit.into()),
 192         additional_text_edits: Some(additional_text_edits),
 193         documentation: completion_item.documentation().map(documentation),
 194         deprecated: Some(completion_item.deprecated()),
 195         ..Default::default()
 196     };
 197
 198     if completion_item.score().is_some() {
 199         res.preselect = Some(true);
 200         // HACK: sort preselect items first
 201         res.sort_text = Some(format!(" {}", completion_item.label()));
 202     }
 203
 204     if completion_item.deprecated() {
 205         res.tags = Some(vec![lsp_types::CompletionItemTag::Deprecated])
 206     }
 207
 208     if completion_item.trigger_call_info() {
 209         res.command = Some(lsp_types::Command {
 210             title: "triggerParameterHints".into(),
 211             command: "editor.action.triggerParameterHints".into(),
 212             arguments: None,
 213         });
 214     }
 215
 216     res.insert_text_format = Some(insert_text_format(completion_item.insert_text_format()));
 217
 218     res
 219 }
 220
 221 pub(crate) fn signature_information(
 222     signature: FunctionSignature,
 223     concise: bool,
 224 ) -> lsp_types::SignatureInformation {
 225     let (label, documentation, params) = if concise {
 226         let mut params = signature.parameters;
 227         if signature.has_self_param {
 228             params.remove(0);
 229         }
 230         (params.join(", "), None, params)
 231     } else {
 232         (signature.to_string(), signature.doc.map(documentation), signature.parameters)
 233     };
 234
 235     let parameters: Vec<lsp_types::ParameterInformation> = params
 236         .into_iter()
 237         .map(|param| lsp_types::ParameterInformation {
 238             label: lsp_types::ParameterLabel::Simple(param),
 239             documentation: None,
 240         })
 241         .collect();
 242
 243     lsp_types::SignatureInformation { label, documentation, parameters: Some(parameters) }
 244 }
 245
 246 pub(crate) fn inlay_int(line_index: &LineIndex, inlay_hint: InlayHint) -> lsp_ext::InlayHint {
 247     lsp_ext::InlayHint {
 248         label: inlay_hint.label.to_string(),
 249         range: range(line_index, inlay_hint.range),
 250         kind: match inlay_hint.kind {
 251             InlayKind::ParameterHint => lsp_ext::InlayKind::ParameterHint,
 252             InlayKind::TypeHint => lsp_ext::InlayKind::TypeHint,
 253             InlayKind::ChainingHint => lsp_ext::InlayKind::ChainingHint,
 254         },
 255     }
 256 }
 257
 258 pub(crate) fn semantic_tokens(
 259     text: &str,
 260     line_index: &LineIndex,
 261     highlights: Vec<HighlightedRange>,
 262 ) -> lsp_types::SemanticTokens {
 263     let mut builder = semantic_tokens::SemanticTokensBuilder::default();
 264
 265     for highlight_range in highlights {
 266         let (type_, mods) = semantic_token_type_and_modifiers(highlight_range.highlight);
 267         let token_index = semantic_tokens::type_index(type_);
 268         let modifier_bitset = mods.0;
 269
 270         for mut text_range in line_index.lines(highlight_range.range) {
 271             if text[text_range].ends_with('\n') {
 272                 text_range =
 273                     TextRange::new(text_range.start(), text_range.end() - TextSize::of('\n'));
 274             }
 275             let range = range(&line_index, text_range);
 276             builder.push(range, token_index, modifier_bitset);
 277         }
 278     }
 279
 280     builder.build()
 281 }
 282
 283 fn semantic_token_type_and_modifiers(
 284     highlight: Highlight,
 285 ) -> (lsp_types::SemanticTokenType, semantic_tokens::ModifierSet) {
 286     let mut mods = semantic_tokens::ModifierSet::default();
 287     let type_ = match highlight.tag {
 288         HighlightTag::Struct => lsp_types::SemanticTokenType::STRUCT,
 289         HighlightTag::Enum => lsp_types::SemanticTokenType::ENUM,
 290         HighlightTag::Union => semantic_tokens::UNION,
 291         HighlightTag::TypeAlias => semantic_tokens::TYPE_ALIAS,
 292         HighlightTag::Trait => lsp_types::SemanticTokenType::INTERFACE,
 293         HighlightTag::BuiltinType => semantic_tokens::BUILTIN_TYPE,
 294         HighlightTag::SelfKeyword => semantic_tokens::SELF_KEYWORD,
 295         HighlightTag::SelfType => lsp_types::SemanticTokenType::TYPE,
 296         HighlightTag::Field => lsp_types::SemanticTokenType::PROPERTY,
 297         HighlightTag::Function => lsp_types::SemanticTokenType::FUNCTION,
 298         HighlightTag::Module => lsp_types::SemanticTokenType::NAMESPACE,
 299         HighlightTag::Constant => {
 300             mods |= semantic_tokens::CONSTANT;
 301             mods |= lsp_types::SemanticTokenModifier::STATIC;
 302             lsp_types::SemanticTokenType::VARIABLE
 303         }
 304         HighlightTag::Static => {
 305             mods |= lsp_types::SemanticTokenModifier::STATIC;
 306             lsp_types::SemanticTokenType::VARIABLE
 307         }
 308         HighlightTag::EnumVariant => semantic_tokens::ENUM_MEMBER,
 309         HighlightTag::Macro => lsp_types::SemanticTokenType::MACRO,
 310         HighlightTag::Local => lsp_types::SemanticTokenType::VARIABLE,
 311         HighlightTag::TypeParam => lsp_types::SemanticTokenType::TYPE_PARAMETER,
 312         HighlightTag::Lifetime => semantic_tokens::LIFETIME,
 313         HighlightTag::ByteLiteral | HighlightTag::NumericLiteral => {
 314             lsp_types::SemanticTokenType::NUMBER
 315         }
 316         HighlightTag::BoolLiteral => semantic_tokens::BOOLEAN,
 317         HighlightTag::CharLiteral | HighlightTag::StringLiteral => {
 318             lsp_types::SemanticTokenType::STRING
 319         }
 320         HighlightTag::Comment => lsp_types::SemanticTokenType::COMMENT,
 321         HighlightTag::Attribute => semantic_tokens::ATTRIBUTE,
 322         HighlightTag::Keyword => lsp_types::SemanticTokenType::KEYWORD,
 323         HighlightTag::UnresolvedReference => semantic_tokens::UNRESOLVED_REFERENCE,
 324         HighlightTag::FormatSpecifier => semantic_tokens::FORMAT_SPECIFIER,
 325         HighlightTag::Operator => lsp_types::SemanticTokenType::OPERATOR,
 326         HighlightTag::Punctuation => semantic_tokens::PUNCTUATION,
 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::Injected => semantic_tokens::INJECTED,
 336             HighlightModifier::ControlFlow => semantic_tokens::CONTROL_FLOW,
 337             HighlightModifier::Mutable => semantic_tokens::MUTABLE,
 338             HighlightModifier::Unsafe => semantic_tokens::UNSAFE,
 339         };
 340         mods |= modifier;
 341     }
 342
 343     (type_, mods)
 344 }
 345
 346 pub(crate) fn folding_range(
 347     text: &str,
 348     line_index: &LineIndex,
 349     line_folding_only: bool,
 350     fold: Fold,
 351 ) -> lsp_types::FoldingRange {
 352     let kind = match fold.kind {
 353         FoldKind::Comment => Some(lsp_types::FoldingRangeKind::Comment),
 354         FoldKind::Imports => Some(lsp_types::FoldingRangeKind::Imports),
 355         FoldKind::Mods | FoldKind::Block => None,
 356     };
 357
 358     let range = range(line_index, fold.range);
 359
 360     if line_folding_only {
 361         // Clients with line_folding_only == true (such as VSCode) will fold the whole end line
 362         // even if it contains text not in the folding range. To prevent that we exclude
 363         // range.end.line from the folding region if there is more text after range.end
 364         // on the same line.
 365         let has_more_text_on_end_line = text[TextRange::new(fold.range.end(), TextSize::of(text))]
 366             .chars()
 367             .take_while(|it| *it != '\n')
 368             .any(|it| !it.is_whitespace());
 369
 370         let end_line = if has_more_text_on_end_line {
 371             range.end.line.saturating_sub(1)
 372         } else {
 373             range.end.line
 374         };
 375
 376         lsp_types::FoldingRange {
 377             start_line: range.start.line,
 378             start_character: None,
 379             end_line,
 380             end_character: None,
 381             kind,
 382         }
 383     } else {
 384         lsp_types::FoldingRange {
 385             start_line: range.start.line,
 386             start_character: Some(range.start.character),
 387             end_line: range.end.line,
 388             end_character: Some(range.end.character),
 389             kind,
 390         }
 391     }
 392 }
 393
 394 pub(crate) fn url(snap: &GlobalStateSnapshot, file_id: FileId) -> lsp_types::Url {
 395     snap.file_id_to_url(file_id)
 396 }
 397
 398 /// Returns a `Url` object from a given path, will lowercase drive letters if present.
 399 /// This will only happen when processing windows paths.
 400 ///
 401 /// When processing non-windows path, this is essentially the same as `Url::from_file_path`.
 402 pub(crate) fn url_from_abs_path(path: &Path) -> lsp_types::Url {
 403     assert!(path.is_absolute());
 404     let url = lsp_types::Url::from_file_path(path).unwrap();
 405     match path.components().next() {
 406         Some(path::Component::Prefix(prefix)) if matches!(prefix.kind(), path::Prefix::Disk(_) | path::Prefix::VerbatimDisk(_)) =>
 407         {
 408             // Need to lowercase driver letter
 409         }
 410         _ => return url,
 411     }
 412
 413     let driver_letter_range = {
 414         let (scheme, drive_letter, _rest) = match url.as_str().splitn(3, ':').collect_tuple() {
 415             Some(it) => it,
 416             None => return url,
 417         };
 418         let start = scheme.len() + ':'.len_utf8();
 419         start..(start + drive_letter.len())
 420     };
 421
 422     // Note: lowercasing the `path` itself doesn't help, the `Url::parse`
 423     // machinery *also* canonicalizes the drive letter. So, just massage the
 424     // string in place.
 425     let mut url = url.into_string();
 426     url[driver_letter_range].make_ascii_lowercase();
 427     lsp_types::Url::parse(&url).unwrap()
 428 }
 429
 430 pub(crate) fn versioned_text_document_identifier(
 431     snap: &GlobalStateSnapshot,
 432     file_id: FileId,
 433     version: Option<i64>,
 434 ) -> lsp_types::VersionedTextDocumentIdentifier {
 435     lsp_types::VersionedTextDocumentIdentifier { uri: url(snap, file_id), version }
 436 }
 437
 438 pub(crate) fn location(
 439     snap: &GlobalStateSnapshot,
 440     frange: FileRange,
 441 ) -> Result<lsp_types::Location> {
 442     let url = url(snap, frange.file_id);
 443     let line_index = snap.analysis().file_line_index(frange.file_id)?;
 444     let range = range(&line_index, frange.range);
 445     let loc = lsp_types::Location::new(url, range);
 446     Ok(loc)
 447 }
 448
 449 pub(crate) fn location_link(
 450     snap: &GlobalStateSnapshot,
 451     src: Option<FileRange>,
 452     target: NavigationTarget,
 453 ) -> Result<lsp_types::LocationLink> {
 454     let origin_selection_range = match src {
 455         Some(src) => {
 456             let line_index = snap.analysis().file_line_index(src.file_id)?;
 457             let range = range(&line_index, src.range);
 458             Some(range)
 459         }
 460         None => None,
 461     };
 462     let (target_uri, target_range, target_selection_range) = location_info(snap, target)?;
 463     let res = lsp_types::LocationLink {
 464         origin_selection_range,
 465         target_uri,
 466         target_range,
 467         target_selection_range,
 468     };
 469     Ok(res)
 470 }
 471
 472 fn location_info(
 473     snap: &GlobalStateSnapshot,
 474     target: NavigationTarget,
 475 ) -> Result<(lsp_types::Url, lsp_types::Range, lsp_types::Range)> {
 476     let line_index = snap.analysis().file_line_index(target.file_id())?;
 477
 478     let target_uri = url(snap, target.file_id());
 479     let target_range = range(&line_index, target.full_range());
 480     let target_selection_range =
 481         target.focus_range().map(|it| range(&line_index, it)).unwrap_or(target_range);
 482     Ok((target_uri, target_range, target_selection_range))
 483 }
 484
 485 pub(crate) fn goto_definition_response(
 486     snap: &GlobalStateSnapshot,
 487     src: Option<FileRange>,
 488     targets: Vec<NavigationTarget>,
 489 ) -> Result<lsp_types::GotoDefinitionResponse> {
 490     if snap.config.client_caps.location_link {
 491         let links = targets
 492             .into_iter()
 493             .map(|nav| location_link(snap, src, nav))
 494             .collect::<Result<Vec<_>>>()?;
 495         Ok(links.into())
 496     } else {
 497         let locations = targets
 498             .into_iter()
 499             .map(|nav| {
 500                 location(
 501                     snap,
 502                     FileRange {
 503                         file_id: nav.file_id(),
 504                         range: nav.focus_range().unwrap_or(nav.range()),
 505                     },
 506                 )
 507             })
 508             .collect::<Result<Vec<_>>>()?;
 509         Ok(locations.into())
 510     }
 511 }
 512
 513 pub(crate) fn snippet_text_document_edit(
 514     snap: &GlobalStateSnapshot,
 515     is_snippet: bool,
 516     source_file_edit: SourceFileEdit,
 517 ) -> Result<lsp_ext::SnippetTextDocumentEdit> {
 518     let text_document = versioned_text_document_identifier(snap, source_file_edit.file_id, None);
 519     let line_index = snap.analysis().file_line_index(source_file_edit.file_id)?;
 520     let line_endings = snap.file_line_endings(source_file_edit.file_id);
 521     let edits = source_file_edit
 522         .edit
 523         .into_iter()
 524         .map(|it| snippet_text_edit(&line_index, line_endings, is_snippet, it))
 525         .collect();
 526     Ok(lsp_ext::SnippetTextDocumentEdit { text_document, edits })
 527 }
 528
 529 pub(crate) fn resource_op(
 530     snap: &GlobalStateSnapshot,
 531     file_system_edit: FileSystemEdit,
 532 ) -> lsp_types::ResourceOp {
 533     match file_system_edit {
 534         FileSystemEdit::CreateFile { anchor, dst } => {
 535             let uri = snap.anchored_path(anchor, &dst);
 536             lsp_types::ResourceOp::Create(lsp_types::CreateFile { uri, options: None })
 537         }
 538         FileSystemEdit::MoveFile { src, anchor, dst } => {
 539             let old_uri = snap.file_id_to_url(src);
 540             let new_uri = snap.anchored_path(anchor, &dst);
 541             lsp_types::ResourceOp::Rename(lsp_types::RenameFile { old_uri, new_uri, options: None })
 542         }
 543     }
 544 }
 545
 546 pub(crate) fn snippet_workspace_edit(
 547     snap: &GlobalStateSnapshot,
 548     source_change: SourceChange,
 549 ) -> Result<lsp_ext::SnippetWorkspaceEdit> {
 550     let mut document_changes: Vec<lsp_ext::SnippetDocumentChangeOperation> = Vec::new();
 551     for op in source_change.file_system_edits {
 552         let op = resource_op(&snap, op);
 553         document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Op(op));
 554     }
 555     for edit in source_change.source_file_edits {
 556         let edit = snippet_text_document_edit(&snap, source_change.is_snippet, edit)?;
 557         document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Edit(edit));
 558     }
 559     let workspace_edit =
 560         lsp_ext::SnippetWorkspaceEdit { changes: None, document_changes: Some(document_changes) };
 561     Ok(workspace_edit)
 562 }
 563
 564 pub(crate) fn workspace_edit(
 565     snap: &GlobalStateSnapshot,
 566     source_change: SourceChange,
 567 ) -> Result<lsp_types::WorkspaceEdit> {
 568     assert!(!source_change.is_snippet);
 569     snippet_workspace_edit(snap, source_change).map(|it| it.into())
 570 }
 571
 572 impl From<lsp_ext::SnippetWorkspaceEdit> for lsp_types::WorkspaceEdit {
 573     fn from(snippet_workspace_edit: lsp_ext::SnippetWorkspaceEdit) -> lsp_types::WorkspaceEdit {
 574         lsp_types::WorkspaceEdit {
 575             changes: None,
 576             document_changes: snippet_workspace_edit.document_changes.map(|changes| {
 577                 lsp_types::DocumentChanges::Operations(
 578                     changes
 579                         .into_iter()
 580                         .map(|change| match change {
 581                             lsp_ext::SnippetDocumentChangeOperation::Op(op) => {
 582                                 lsp_types::DocumentChangeOperation::Op(op)
 583                             }
 584                             lsp_ext::SnippetDocumentChangeOperation::Edit(edit) => {
 585                                 lsp_types::DocumentChangeOperation::Edit(
 586                                     lsp_types::TextDocumentEdit {
 587                                         text_document: edit.text_document,
 588                                         edits: edit
 589                                             .edits
 590                                             .into_iter()
 591                                             .map(|edit| lsp_types::TextEdit {
 592                                                 range: edit.range,
 593                                                 new_text: edit.new_text,
 594                                             })
 595                                             .collect(),
 596                                     },
 597                                 )
 598                             }
 599                         })
 600                         .collect(),
 601                 )
 602             }),
 603         }
 604     }
 605 }
 606
 607 pub(crate) fn call_hierarchy_item(
 608     snap: &GlobalStateSnapshot,
 609     target: NavigationTarget,
 610 ) -> Result<lsp_types::CallHierarchyItem> {
 611     let name = target.name().to_string();
 612     let detail = target.description().map(|it| it.to_string());
 613     let kind = symbol_kind(target.kind());
 614     let (uri, range, selection_range) = location_info(snap, target)?;
 615     Ok(lsp_types::CallHierarchyItem { name, kind, tags: None, detail, uri, range, selection_range })
 616 }
 617
 618 pub(crate) fn unresolved_code_action(
 619     snap: &GlobalStateSnapshot,
 620     assist: Assist,
 621     index: usize,
 622 ) -> Result<lsp_ext::CodeAction> {
 623     let res = lsp_ext::CodeAction {
 624         title: assist.label,
 625         id: Some(format!("{}:{}", assist.id.0.to_owned(), index.to_string())),
 626         group: assist.group.filter(|_| snap.config.client_caps.code_action_group).map(|gr| gr.0),
 627         kind: Some(String::new()),
 628         edit: None,
 629         command: None,
 630     };
 631     Ok(res)
 632 }
 633
 634 pub(crate) fn resolved_code_action(
 635     snap: &GlobalStateSnapshot,
 636     assist: ResolvedAssist,
 637 ) -> Result<lsp_ext::CodeAction> {
 638     let change = assist.source_change;
 639     unresolved_code_action(snap, assist.assist, 0).and_then(|it| {
 640         Ok(lsp_ext::CodeAction {
 641             id: None,
 642             edit: Some(snippet_workspace_edit(snap, change)?),
 643             ..it
 644         })
 645     })
 646 }
 647
 648 pub(crate) fn runnable(
 649     snap: &GlobalStateSnapshot,
 650     file_id: FileId,
 651     runnable: Runnable,
 652 ) -> Result<lsp_ext::Runnable> {
 653     let spec = CargoTargetSpec::for_file(snap, file_id)?;
 654     let workspace_root = spec.as_ref().map(|it| it.workspace_root.clone());
 655     let target = spec.as_ref().map(|s| s.target.clone());
 656     let (cargo_args, executable_args) =
 657         CargoTargetSpec::runnable_args(spec, &runnable.kind, &runnable.cfg_exprs)?;
 658     let label = runnable.label(target);
 659     let location = location_link(snap, None, runnable.nav)?;
 660
 661     Ok(lsp_ext::Runnable {
 662         label,
 663         location: Some(location),
 664         kind: lsp_ext::RunnableKind::Cargo,
 665         args: lsp_ext::CargoRunnable {
 666             workspace_root: workspace_root,
 667             cargo_args,
 668             executable_args,
 669         },
 670     })
 671 }
 672
 673 #[cfg(test)]
 674 mod tests {
 675     use test_utils::extract_ranges;
 676
 677     use super::*;
 678
 679     #[test]
 680     fn conv_fold_line_folding_only_fixup() {
 681         let text = r#"<fold>mod a;
 682 mod b;
 683 mod c;</fold>
 684
 685 fn main() <fold>{
 686     if cond <fold>{
 687         a::do_a();
 688     }</fold> else <fold>{
 689         b::do_b();
 690     }</fold>
 691 }</fold>"#;
 692
 693         let (ranges, text) = extract_ranges(text, "fold");
 694         assert_eq!(ranges.len(), 4);
 695         let folds = vec![
 696             Fold { range: ranges[0], kind: FoldKind::Mods },
 697             Fold { range: ranges[1], kind: FoldKind::Block },
 698             Fold { range: ranges[2], kind: FoldKind::Block },
 699             Fold { range: ranges[3], kind: FoldKind::Block },
 700         ];
 701
 702         let line_index = LineIndex::new(&text);
 703         let converted: Vec<lsp_types::FoldingRange> =
 704             folds.into_iter().map(|it| folding_range(&text, &line_index, true, it)).collect();
 705
 706         let expected_lines = [(0, 2), (4, 10), (5, 6), (7, 9)];
 707         assert_eq!(converted.len(), expected_lines.len());
 708         for (folding_range, (start_line, end_line)) in converted.iter().zip(expected_lines.iter()) {
 709             assert_eq!(folding_range.start_line, *start_line);
 710             assert_eq!(folding_range.start_character, None);
 711             assert_eq!(folding_range.end_line, *end_line);
 712             assert_eq!(folding_range.end_character, None);
 713         }
 714     }
 715
 716     // `Url` is not able to parse windows paths on unix machines.
 717     #[test]
 718     #[cfg(target_os = "windows")]
 719     fn test_lowercase_drive_letter_with_drive() {
 720         let url = url_from_abs_path(Path::new("C:\\Test"));
 721         assert_eq!(url.to_string(), "file:///c:/Test");
 722     }
 723
 724     #[test]
 725     #[cfg(target_os = "windows")]
 726     fn test_drive_without_colon_passthrough() {
 727         let url = url_from_abs_path(Path::new(r#"\\localhost\C$\my_dir"#));
 728         assert_eq!(url.to_string(), "file://localhost/C$/my_dir");
 729     }
 730 }