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 snippet_text_edit_vec(
 139     line_index: &LineIndex,
 140     line_endings: LineEndings,
 141     is_snippet: bool,
 142     text_edit: TextEdit,
 143 ) -> Vec<lsp_ext::SnippetTextEdit> {
 144     text_edit
 145         .into_iter()
 146         .map(|indel| self::snippet_text_edit(line_index, line_endings, is_snippet, indel))
 147         .collect()
 148 }
 149
 150 pub(crate) fn completion_item(
 151     line_index: &LineIndex,
 152     line_endings: LineEndings,
 153     completion_item: CompletionItem,
 154 ) -> lsp_types::CompletionItem {
 155     let mut additional_text_edits = Vec::new();
 156     let mut text_edit = None;
 157     // LSP does not allow arbitrary edits in completion, so we have to do a
 158     // non-trivial mapping here.
 159     let source_range = completion_item.source_range();
 160     for indel in completion_item.text_edit().iter() {
 161         if indel.delete.contains_range(source_range) {
 162             text_edit = Some(if indel.delete == source_range {
 163                 self::text_edit(line_index, line_endings, indel.clone())
 164             } else {
 165                 assert!(source_range.end() == indel.delete.end());
 166                 let range1 = TextRange::new(indel.delete.start(), source_range.start());
 167                 let range2 = source_range;
 168                 let indel1 = Indel::replace(range1, String::new());
 169                 let indel2 = Indel::replace(range2, indel.insert.clone());
 170                 additional_text_edits.push(self::text_edit(line_index, line_endings, indel1));
 171                 self::text_edit(line_index, line_endings, indel2)
 172             })
 173         } else {
 174             assert!(source_range.intersect(indel.delete).is_none());
 175             let text_edit = self::text_edit(line_index, line_endings, indel.clone());
 176             additional_text_edits.push(text_edit);
 177         }
 178     }
 179     let text_edit = text_edit.unwrap();
 180
 181     let mut res = lsp_types::CompletionItem {
 182         label: completion_item.label().to_string(),
 183         detail: completion_item.detail().map(|it| it.to_string()),
 184         filter_text: Some(completion_item.lookup().to_string()),
 185         kind: completion_item.kind().map(completion_item_kind),
 186         text_edit: Some(text_edit.into()),
 187         additional_text_edits: Some(additional_text_edits),
 188         documentation: completion_item.documentation().map(documentation),
 189         deprecated: Some(completion_item.deprecated()),
 190         ..Default::default()
 191     };
 192
 193     if completion_item.score().is_some() {
 194         res.preselect = Some(true);
 195         // HACK: sort preselect items first
 196         res.sort_text = Some(format!(" {}", completion_item.label()));
 197     }
 198
 199     if completion_item.deprecated() {
 200         res.tags = Some(vec![lsp_types::CompletionItemTag::Deprecated])
 201     }
 202
 203     if completion_item.trigger_call_info() {
 204         res.command = Some(lsp_types::Command {
 205             title: "triggerParameterHints".into(),
 206             command: "editor.action.triggerParameterHints".into(),
 207             arguments: None,
 208         });
 209     }
 210
 211     res.insert_text_format = Some(insert_text_format(completion_item.insert_text_format()));
 212
 213     res
 214 }
 215
 216 pub(crate) fn signature_information(
 217     signature: FunctionSignature,
 218     concise: bool,
 219 ) -> lsp_types::SignatureInformation {
 220     let (label, documentation, params) = if concise {
 221         let mut params = signature.parameters;
 222         if signature.has_self_param {
 223             params.remove(0);
 224         }
 225         (params.join(", "), None, params)
 226     } else {
 227         (signature.to_string(), signature.doc.map(documentation), signature.parameters)
 228     };
 229
 230     let parameters: Vec<lsp_types::ParameterInformation> = params
 231         .into_iter()
 232         .map(|param| lsp_types::ParameterInformation {
 233             label: lsp_types::ParameterLabel::Simple(param),
 234             documentation: None,
 235         })
 236         .collect();
 237
 238     lsp_types::SignatureInformation { label, documentation, parameters: Some(parameters) }
 239 }
 240
 241 pub(crate) fn inlay_int(line_index: &LineIndex, inlay_hint: InlayHint) -> lsp_ext::InlayHint {
 242     lsp_ext::InlayHint {
 243         label: inlay_hint.label.to_string(),
 244         range: range(line_index, inlay_hint.range),
 245         kind: match inlay_hint.kind {
 246             InlayKind::ParameterHint => lsp_ext::InlayKind::ParameterHint,
 247             InlayKind::TypeHint => lsp_ext::InlayKind::TypeHint,
 248             InlayKind::ChainingHint => lsp_ext::InlayKind::ChainingHint,
 249         },
 250     }
 251 }
 252
 253 pub(crate) fn semantic_tokens(
 254     text: &str,
 255     line_index: &LineIndex,
 256     highlights: Vec<HighlightedRange>,
 257 ) -> lsp_types::SemanticTokens {
 258     let mut builder = semantic_tokens::SemanticTokensBuilder::default();
 259
 260     for highlight_range in highlights {
 261         let (type_, mods) = semantic_token_type_and_modifiers(highlight_range.highlight);
 262         let token_index = semantic_tokens::type_index(type_);
 263         let modifier_bitset = mods.0;
 264
 265         for mut text_range in line_index.lines(highlight_range.range) {
 266             if text[text_range].ends_with('\n') {
 267                 text_range =
 268                     TextRange::new(text_range.start(), text_range.end() - TextSize::of('\n'));
 269             }
 270             let range = range(&line_index, text_range);
 271             builder.push(range, token_index, modifier_bitset);
 272         }
 273     }
 274
 275     builder.build()
 276 }
 277
 278 fn semantic_token_type_and_modifiers(
 279     highlight: Highlight,
 280 ) -> (lsp_types::SemanticTokenType, semantic_tokens::ModifierSet) {
 281     let mut mods = semantic_tokens::ModifierSet::default();
 282     let type_ = match highlight.tag {
 283         HighlightTag::Struct => lsp_types::SemanticTokenType::STRUCT,
 284         HighlightTag::Enum => lsp_types::SemanticTokenType::ENUM,
 285         HighlightTag::Union => semantic_tokens::UNION,
 286         HighlightTag::TypeAlias => semantic_tokens::TYPE_ALIAS,
 287         HighlightTag::Trait => lsp_types::SemanticTokenType::INTERFACE,
 288         HighlightTag::BuiltinType => semantic_tokens::BUILTIN_TYPE,
 289         HighlightTag::SelfType => lsp_types::SemanticTokenType::TYPE,
 290         HighlightTag::Field => lsp_types::SemanticTokenType::PROPERTY,
 291         HighlightTag::Function => lsp_types::SemanticTokenType::FUNCTION,
 292         HighlightTag::Module => lsp_types::SemanticTokenType::NAMESPACE,
 293         HighlightTag::Constant => {
 294             mods |= semantic_tokens::CONSTANT;
 295             mods |= lsp_types::SemanticTokenModifier::STATIC;
 296             lsp_types::SemanticTokenType::VARIABLE
 297         }
 298         HighlightTag::Static => {
 299             mods |= lsp_types::SemanticTokenModifier::STATIC;
 300             lsp_types::SemanticTokenType::VARIABLE
 301         }
 302         HighlightTag::EnumVariant => semantic_tokens::ENUM_MEMBER,
 303         HighlightTag::Macro => lsp_types::SemanticTokenType::MACRO,
 304         HighlightTag::Local => lsp_types::SemanticTokenType::VARIABLE,
 305         HighlightTag::TypeParam => lsp_types::SemanticTokenType::TYPE_PARAMETER,
 306         HighlightTag::Lifetime => semantic_tokens::LIFETIME,
 307         HighlightTag::ByteLiteral | HighlightTag::NumericLiteral => {
 308             lsp_types::SemanticTokenType::NUMBER
 309         }
 310         HighlightTag::BoolLiteral => semantic_tokens::BOOLEAN,
 311         HighlightTag::CharLiteral | HighlightTag::StringLiteral => {
 312             lsp_types::SemanticTokenType::STRING
 313         }
 314         HighlightTag::Comment => lsp_types::SemanticTokenType::COMMENT,
 315         HighlightTag::Attribute => semantic_tokens::ATTRIBUTE,
 316         HighlightTag::Keyword => lsp_types::SemanticTokenType::KEYWORD,
 317         HighlightTag::UnresolvedReference => semantic_tokens::UNRESOLVED_REFERENCE,
 318         HighlightTag::FormatSpecifier => semantic_tokens::FORMAT_SPECIFIER,
 319     };
 320
 321     for modifier in highlight.modifiers.iter() {
 322         let modifier = match modifier {
 323             HighlightModifier::Attribute => semantic_tokens::ATTRIBUTE_MODIFIER,
 324             HighlightModifier::Definition => lsp_types::SemanticTokenModifier::DECLARATION,
 325             HighlightModifier::ControlFlow => semantic_tokens::CONTROL_FLOW,
 326             HighlightModifier::Mutable => semantic_tokens::MUTABLE,
 327             HighlightModifier::Unsafe => semantic_tokens::UNSAFE,
 328         };
 329         mods |= modifier;
 330     }
 331
 332     (type_, mods)
 333 }
 334
 335 pub(crate) fn folding_range(
 336     text: &str,
 337     line_index: &LineIndex,
 338     line_folding_only: bool,
 339     fold: Fold,
 340 ) -> lsp_types::FoldingRange {
 341     let kind = match fold.kind {
 342         FoldKind::Comment => Some(lsp_types::FoldingRangeKind::Comment),
 343         FoldKind::Imports => Some(lsp_types::FoldingRangeKind::Imports),
 344         FoldKind::Mods | FoldKind::Block => None,
 345     };
 346
 347     let range = range(line_index, fold.range);
 348
 349     if line_folding_only {
 350         // Clients with line_folding_only == true (such as VSCode) will fold the whole end line
 351         // even if it contains text not in the folding range. To prevent that we exclude
 352         // range.end.line from the folding region if there is more text after range.end
 353         // on the same line.
 354         let has_more_text_on_end_line = text[TextRange::new(fold.range.end(), TextSize::of(text))]
 355             .chars()
 356             .take_while(|it| *it != '\n')
 357             .any(|it| !it.is_whitespace());
 358
 359         let end_line = if has_more_text_on_end_line {
 360             range.end.line.saturating_sub(1)
 361         } else {
 362             range.end.line
 363         };
 364
 365         lsp_types::FoldingRange {
 366             start_line: range.start.line,
 367             start_character: None,
 368             end_line,
 369             end_character: None,
 370             kind,
 371         }
 372     } else {
 373         lsp_types::FoldingRange {
 374             start_line: range.start.line,
 375             start_character: Some(range.start.character),
 376             end_line: range.end.line,
 377             end_character: Some(range.end.character),
 378             kind,
 379         }
 380     }
 381 }
 382
 383 pub(crate) fn url(world: &WorldSnapshot, file_id: FileId) -> Result<lsp_types::Url> {
 384     world.file_id_to_uri(file_id)
 385 }
 386
 387 pub(crate) fn versioned_text_document_identifier(
 388     world: &WorldSnapshot,
 389     file_id: FileId,
 390     version: Option<i64>,
 391 ) -> Result<lsp_types::VersionedTextDocumentIdentifier> {
 392     let res = lsp_types::VersionedTextDocumentIdentifier { uri: url(world, file_id)?, version };
 393     Ok(res)
 394 }
 395
 396 pub(crate) fn location(world: &WorldSnapshot, frange: FileRange) -> Result<lsp_types::Location> {
 397     let url = url(world, frange.file_id)?;
 398     let line_index = world.analysis().file_line_index(frange.file_id)?;
 399     let range = range(&line_index, frange.range);
 400     let loc = lsp_types::Location::new(url, range);
 401     Ok(loc)
 402 }
 403
 404 pub(crate) fn location_link(
 405     world: &WorldSnapshot,
 406     src: FileRange,
 407     target: NavigationTarget,
 408 ) -> Result<lsp_types::LocationLink> {
 409     let src_location = location(world, src)?;
 410     let (target_uri, target_range, target_selection_range) = location_info(world, target)?;
 411     let res = lsp_types::LocationLink {
 412         origin_selection_range: Some(src_location.range),
 413         target_uri,
 414         target_range,
 415         target_selection_range,
 416     };
 417     Ok(res)
 418 }
 419
 420 fn location_info(
 421     world: &WorldSnapshot,
 422     target: NavigationTarget,
 423 ) -> Result<(lsp_types::Url, lsp_types::Range, lsp_types::Range)> {
 424     let line_index = world.analysis().file_line_index(target.file_id())?;
 425
 426     let target_uri = url(world, target.file_id())?;
 427     let target_range = range(&line_index, target.full_range());
 428     let target_selection_range =
 429         target.focus_range().map(|it| range(&line_index, it)).unwrap_or(target_range);
 430     Ok((target_uri, target_range, target_selection_range))
 431 }
 432
 433 pub(crate) fn goto_definition_response(
 434     world: &WorldSnapshot,
 435     src: FileRange,
 436     targets: Vec<NavigationTarget>,
 437 ) -> Result<lsp_types::GotoDefinitionResponse> {
 438     if world.config.client_caps.location_link {
 439         let links = targets
 440             .into_iter()
 441             .map(|nav| location_link(world, src, nav))
 442             .collect::<Result<Vec<_>>>()?;
 443         Ok(links.into())
 444     } else {
 445         let locations = targets
 446             .into_iter()
 447             .map(|nav| {
 448                 location(
 449                     world,
 450                     FileRange {
 451                         file_id: nav.file_id(),
 452                         range: nav.focus_range().unwrap_or(nav.range()),
 453                     },
 454                 )
 455             })
 456             .collect::<Result<Vec<_>>>()?;
 457         Ok(locations.into())
 458     }
 459 }
 460
 461 pub(crate) fn snippet_text_document_edit(
 462     world: &WorldSnapshot,
 463     is_snippet: bool,
 464     source_file_edit: SourceFileEdit,
 465 ) -> Result<lsp_ext::SnippetTextDocumentEdit> {
 466     let text_document = versioned_text_document_identifier(world, source_file_edit.file_id, None)?;
 467     let line_index = world.analysis().file_line_index(source_file_edit.file_id)?;
 468     let line_endings = world.file_line_endings(source_file_edit.file_id);
 469     let edits = source_file_edit
 470         .edit
 471         .into_iter()
 472         .map(|it| snippet_text_edit(&line_index, line_endings, is_snippet, it))
 473         .collect();
 474     Ok(lsp_ext::SnippetTextDocumentEdit { text_document, edits })
 475 }
 476
 477 pub(crate) fn resource_op(
 478     world: &WorldSnapshot,
 479     file_system_edit: FileSystemEdit,
 480 ) -> Result<lsp_types::ResourceOp> {
 481     let res = match file_system_edit {
 482         FileSystemEdit::CreateFile { source_root, path } => {
 483             let uri = world.path_to_uri(source_root, &path)?;
 484             lsp_types::ResourceOp::Create(lsp_types::CreateFile { uri, options: None })
 485         }
 486         FileSystemEdit::MoveFile { src, dst_source_root, dst_path } => {
 487             let old_uri = world.file_id_to_uri(src)?;
 488             let new_uri = world.path_to_uri(dst_source_root, &dst_path)?;
 489             lsp_types::ResourceOp::Rename(lsp_types::RenameFile { old_uri, new_uri, options: None })
 490         }
 491     };
 492     Ok(res)
 493 }
 494
 495 pub(crate) fn snippet_workspace_edit(
 496     world: &WorldSnapshot,
 497     source_change: SourceChange,
 498 ) -> Result<lsp_ext::SnippetWorkspaceEdit> {
 499     let mut document_changes: Vec<lsp_ext::SnippetDocumentChangeOperation> = Vec::new();
 500     for op in source_change.file_system_edits {
 501         let op = resource_op(&world, op)?;
 502         document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Op(op));
 503     }
 504     for edit in source_change.source_file_edits {
 505         let edit = snippet_text_document_edit(&world, source_change.is_snippet, edit)?;
 506         document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Edit(edit));
 507     }
 508     let workspace_edit =
 509         lsp_ext::SnippetWorkspaceEdit { changes: None, document_changes: Some(document_changes) };
 510     Ok(workspace_edit)
 511 }
 512
 513 pub(crate) fn workspace_edit(
 514     world: &WorldSnapshot,
 515     source_change: SourceChange,
 516 ) -> Result<lsp_types::WorkspaceEdit> {
 517     assert!(!source_change.is_snippet);
 518     snippet_workspace_edit(world, source_change).map(|it| it.into())
 519 }
 520
 521 impl From<lsp_ext::SnippetWorkspaceEdit> for lsp_types::WorkspaceEdit {
 522     fn from(snippet_workspace_edit: lsp_ext::SnippetWorkspaceEdit) -> lsp_types::WorkspaceEdit {
 523         lsp_types::WorkspaceEdit {
 524             changes: None,
 525             document_changes: snippet_workspace_edit.document_changes.map(|changes| {
 526                 lsp_types::DocumentChanges::Operations(
 527                     changes
 528                         .into_iter()
 529                         .map(|change| match change {
 530                             lsp_ext::SnippetDocumentChangeOperation::Op(op) => {
 531                                 lsp_types::DocumentChangeOperation::Op(op)
 532                             }
 533                             lsp_ext::SnippetDocumentChangeOperation::Edit(edit) => {
 534                                 lsp_types::DocumentChangeOperation::Edit(
 535                                     lsp_types::TextDocumentEdit {
 536                                         text_document: edit.text_document,
 537                                         edits: edit
 538                                             .edits
 539                                             .into_iter()
 540                                             .map(|edit| lsp_types::TextEdit {
 541                                                 range: edit.range,
 542                                                 new_text: edit.new_text,
 543                                             })
 544                                             .collect(),
 545                                     },
 546                                 )
 547                             }
 548                         })
 549                         .collect(),
 550                 )
 551             }),
 552         }
 553     }
 554 }
 555
 556 pub fn call_hierarchy_item(
 557     world: &WorldSnapshot,
 558     target: NavigationTarget,
 559 ) -> Result<lsp_types::CallHierarchyItem> {
 560     let name = target.name().to_string();
 561     let detail = target.description().map(|it| it.to_string());
 562     let kind = symbol_kind(target.kind());
 563     let (uri, range, selection_range) = location_info(world, target)?;
 564     Ok(lsp_types::CallHierarchyItem { name, kind, tags: None, detail, uri, range, selection_range })
 565 }
 566
 567 #[cfg(test)]
 568 mod tests {
 569     use test_utils::extract_ranges;
 570
 571     use super::*;
 572
 573     #[test]
 574     fn conv_fold_line_folding_only_fixup() {
 575         let text = r#"<fold>mod a;
 576 mod b;
 577 mod c;</fold>
 578
 579 fn main() <fold>{
 580     if cond <fold>{
 581         a::do_a();
 582     }</fold> else <fold>{
 583         b::do_b();
 584     }</fold>
 585 }</fold>"#;
 586
 587         let (ranges, text) = extract_ranges(text, "fold");
 588         assert_eq!(ranges.len(), 4);
 589         let folds = vec![
 590             Fold { range: ranges[0], kind: FoldKind::Mods },
 591             Fold { range: ranges[1], kind: FoldKind::Block },
 592             Fold { range: ranges[2], kind: FoldKind::Block },
 593             Fold { range: ranges[3], kind: FoldKind::Block },
 594         ];
 595
 596         let line_index = LineIndex::new(&text);
 597         let converted: Vec<lsp_types::FoldingRange> =
 598             folds.into_iter().map(|it| folding_range(&text, &line_index, true, it)).collect();
 599
 600         let expected_lines = [(0, 2), (4, 10), (5, 6), (7, 9)];
 601         assert_eq!(converted.len(), expected_lines.len());
 602         for (folding_range, (start_line, end_line)) in converted.iter().zip(expected_lines.iter()) {
 603             assert_eq!(folding_range.start_line, *start_line);
 604             assert_eq!(folding_range.start_character, None);
 605             assert_eq!(folding_range.end_line, *end_line);
 606             assert_eq!(folding_range.end_character, None);
 607         }
 608     }
 609 }
 610
 611 pub(crate) fn code_action(world: &WorldSnapshot, assist: Assist) -> Result<lsp_ext::CodeAction> {
 612     let res = lsp_ext::CodeAction {
 613         title: assist.label,
 614         group: if world.config.client_caps.code_action_group { assist.group_label } else { None },
 615         kind: Some(String::new()),
 616         edit: Some(snippet_workspace_edit(world, assist.source_change)?),
 617         command: None,
 618     };
 619     Ok(res)
 620 }