crates/rust-analyzer/src/to_proto.rs

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