mirror of
https://github.com/apple/sourcekit-lsp.git
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36d8a1799c
LSP Spec 3.15 will add a document version field for PublishDiagnostics. Cherry-picking field into SourceKit-LSP.
1242 lines
45 KiB
Swift
1242 lines
45 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import Dispatch
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import struct Foundation.CharacterSet
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import LanguageServerProtocol
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import LSPLogging
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import SKCore
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import SKSupport
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import sourcekitd
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import TSCBasic
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public final class SwiftLanguageServer: ToolchainLanguageServer {
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/// The server's request queue, used to serialize requests and responses to `sourcekitd`.
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public let queue: DispatchQueue = DispatchQueue(label: "swift-language-server-queue", qos: .userInitiated)
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let client: Connection
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let sourcekitd: SwiftSourceKitFramework
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let buildSystem: BuildSystem
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let clientCapabilities: ClientCapabilities
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// FIXME: ideally we wouldn't need separate management from a parent server in the same process.
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var documentManager: DocumentManager
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var currentDiagnostics: [DocumentURI: [CachedDiagnostic]] = [:]
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var buildSettingsByFile: [DocumentURI: FileBuildSettings] = [:]
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let onExit: () -> Void
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var api: sourcekitd_functions_t { return sourcekitd.api }
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var keys: sourcekitd_keys { return sourcekitd.keys }
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var requests: sourcekitd_requests { return sourcekitd.requests }
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var values: sourcekitd_values { return sourcekitd.values }
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/// Creates a language server for the given client using the sourcekitd dylib at the specified path.
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public init(client: Connection, sourcekitd: AbsolutePath, buildSystem: BuildSystem, clientCapabilities: ClientCapabilities, onExit: @escaping () -> Void = {}) throws {
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self.client = client
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self.sourcekitd = try SwiftSourceKitFramework(dylib: sourcekitd)
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self.buildSystem = buildSystem
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self.clientCapabilities = clientCapabilities
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self.documentManager = DocumentManager()
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self.onExit = onExit
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}
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/// Should be called on self.queue.
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func publishDiagnostics(
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response: SKResponseDictionary,
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for snapshot: DocumentSnapshot)
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{
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let stageUID: sourcekitd_uid_t? = response[sourcekitd.keys.diagnostic_stage]
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let stage = stageUID.flatMap { DiagnosticStage($0, sourcekitd: sourcekitd) } ?? .sema
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// Note: we make the notification even if there are no diagnostics to clear the current state.
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var newDiags: [CachedDiagnostic] = []
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response[keys.diagnostics]?.forEach { _, diag in
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if let diag = CachedDiagnostic(diag, in: snapshot) {
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newDiags.append(diag)
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}
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return true
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}
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let document = snapshot.document.uri
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let result = mergeDiagnostics(
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old: currentDiagnostics[document] ?? [],
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new: newDiags, stage: stage)
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currentDiagnostics[document] = result
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client.send(PublishDiagnostics(uri: document, version: snapshot.version, diagnostics: result.map { $0.diagnostic }))
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}
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/// Should be called on self.queue.
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func handleDocumentUpdate(uri: DocumentURI) {
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guard let snapshot = documentManager.latestSnapshot(uri) else {
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return
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}
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// Make the magic 0,0 replacetext request to update diagnostics.
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let req = SKRequestDictionary(sourcekitd: sourcekitd)
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req[keys.request] = requests.editor_replacetext
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req[keys.name] = uri.pseudoPath
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req[keys.offset] = 0
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req[keys.length] = 0
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req[keys.sourcetext] = ""
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if let dict = self.sourcekitd.sendSync(req).success {
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publishDiagnostics(response: dict, for: snapshot)
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}
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}
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}
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extension SwiftLanguageServer {
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public func initializeSync(_ initialize: InitializeRequest) throws -> InitializeResult {
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api.initialize()
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api.set_notification_handler { [weak self] notification in
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guard let self = self else { return }
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let notification = SKResponse(notification, sourcekitd: self.sourcekitd)
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guard let dict = notification.value else {
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log(notification.description, level: .error)
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return
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}
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logAsync(level: .debug) { _ in notification.description }
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if let kind: sourcekitd_uid_t = dict[self.keys.notification],
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kind == self.values.notification_documentupdate,
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let name: String = dict[self.keys.name] {
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self.queue.async {
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let uri: DocumentURI
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if name.starts(with: "/") {
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// If sourcekitd returns us a path, translate it back into a URL
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uri = DocumentURI(URL(fileURLWithPath: name))
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} else {
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uri = DocumentURI(string: name)
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}
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self.handleDocumentUpdate(uri: uri)
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}
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}
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}
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return InitializeResult(capabilities: ServerCapabilities(
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textDocumentSync: TextDocumentSyncOptions(
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openClose: true,
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change: .incremental,
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willSave: true,
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willSaveWaitUntil: false,
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save: TextDocumentSyncOptions.SaveOptions(includeText: false)),
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completionProvider: CompletionOptions(
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resolveProvider: false,
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triggerCharacters: ["."]),
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hoverProvider: true,
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definitionProvider: nil,
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implementationProvider: true,
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referencesProvider: nil,
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documentHighlightProvider: true,
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foldingRangeProvider: true,
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documentSymbolProvider: true,
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colorProvider: true,
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codeActionProvider: CodeActionServerCapabilities(
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clientCapabilities: initialize.capabilities.textDocument?.codeAction,
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codeActionOptions: CodeActionOptions(codeActionKinds: nil),
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supportsCodeActions: true),
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executeCommandProvider: ExecuteCommandOptions(
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commands: builtinSwiftCommands)
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))
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}
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public func clientInitialized(_: InitializedNotification) {
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// Nothing to do.
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}
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func shutdown(_ request: Request<Shutdown>) {
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api.set_notification_handler(nil)
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}
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func exit(_ notification: Notification<Exit>) {
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api.shutdown()
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onExit()
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}
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// MARK: - Workspace
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public func documentUpdatedBuildSettings(_ uri: DocumentURI, language: Language) {
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self.queue.async {
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guard let snapshot = self.documentManager.latestSnapshot(uri) else {
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return
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}
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// Confirm that the build settings actually changed, otherwise we don't
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// need to do anything.
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let newSettings = self.buildSystem.settings(for: uri, language)
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guard self.buildSettingsByFile[uri] != newSettings else {
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return
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}
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self.buildSettingsByFile[uri] = newSettings
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let keys = self.keys
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// Close and re-open the document internally to inform sourcekitd to
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// update the settings. At the moment there's no better way to do this.
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let closeReq = SKRequestDictionary(sourcekitd: self.sourcekitd)
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closeReq[keys.request] = self.requests.editor_close
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closeReq[keys.name] = uri.pseudoPath
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_ = self.sourcekitd.sendSync(closeReq)
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let openReq = SKRequestDictionary(sourcekitd: self.sourcekitd)
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openReq[keys.request] = self.requests.editor_open
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openReq[keys.name] = uri.pseudoPath
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openReq[keys.sourcetext] = snapshot.text
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if let settings = newSettings {
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openReq[keys.compilerargs] = settings.compilerArguments
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}
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guard let dict = self.sourcekitd.sendSync(openReq).success else {
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// Already logged failure.
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return
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}
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self.publishDiagnostics(response: dict, for: snapshot)
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}
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}
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// MARK: - Text synchronization
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public func openDocument(_ note: DidOpenTextDocument) {
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let keys = self.keys
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self.queue.async {
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guard let snapshot = self.documentManager.open(note) else {
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// Already logged failure.
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return
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}
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let uri = snapshot.document.uri
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// Cache the `BuildSystem`'s settings interally.
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let settings = self.buildSystem.settings(for: uri, snapshot.document.language)
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self.buildSettingsByFile[uri] = settings
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let req = SKRequestDictionary(sourcekitd: self.sourcekitd)
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req[keys.request] = self.requests.editor_open
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req[keys.name] = note.textDocument.uri.pseudoPath
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req[keys.sourcetext] = snapshot.text
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if let settings = settings {
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req[keys.compilerargs] = settings.compilerArguments
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}
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guard let dict = self.sourcekitd.sendSync(req).success else {
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// Already logged failure.
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return
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}
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self.publishDiagnostics(response: dict, for: snapshot)
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}
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}
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public func closeDocument(_ note: DidCloseTextDocument) {
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let keys = self.keys
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self.queue.async {
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self.documentManager.close(note)
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let uri = note.textDocument.uri
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let req = SKRequestDictionary(sourcekitd: self.sourcekitd)
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req[keys.request] = self.requests.editor_close
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req[keys.name] = uri.pseudoPath
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// Clear settings that should not be cached for closed documents.
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self.buildSettingsByFile[uri] = nil
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self.currentDiagnostics[uri] = nil
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_ = self.sourcekitd.sendSync(req)
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}
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}
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public func changeDocument(_ note: DidChangeTextDocument) {
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let keys = self.keys
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self.queue.async {
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var lastResponse: SKResponseDictionary? = nil
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let snapshot = self.documentManager.edit(note) { (before: DocumentSnapshot, edit: TextDocumentContentChangeEvent) in
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let req = SKRequestDictionary(sourcekitd: self.sourcekitd)
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req[keys.request] = self.requests.editor_replacetext
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req[keys.name] = note.textDocument.uri.pseudoPath
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if let range = edit.range {
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guard let offset = before.utf8Offset(of: range.lowerBound), let end = before.utf8Offset(of: range.upperBound) else {
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fatalError("invalid edit \(range)")
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}
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req[keys.offset] = offset
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req[keys.length] = end - offset
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} else {
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// Full text
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req[keys.offset] = 0
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req[keys.length] = before.text.utf8.count
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}
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req[keys.sourcetext] = edit.text
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lastResponse = self.sourcekitd.sendSync(req).success
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}
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if let dict = lastResponse, let snapshot = snapshot {
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self.publishDiagnostics(response: dict, for: snapshot)
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}
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}
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}
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public func willSaveDocument(_ note: WillSaveTextDocument) {
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}
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public func didSaveDocument(_ note: DidSaveTextDocument) {
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}
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// MARK: - Language features
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private func computeCompletionTextEdit(completionPos: Position, requestPosition: Position, utf8CodeUnitsToErase: Int, newText: String, snapshot: DocumentSnapshot) -> TextEdit {
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let textEditRangeStart: Position
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// Compute the TextEdit
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if utf8CodeUnitsToErase == 0 {
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// Nothing to delete. Fast path and avoid UTF-8/UTF-16 conversions
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textEditRangeStart = completionPos
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} else if utf8CodeUnitsToErase == 1 {
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// Fast path: Erasing a single UTF-8 byte code unit means we are also need to erase exactly one UTF-16 code unit, meaning we don't need to process the file contents
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if completionPos.utf16index >= 1 {
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// We can delete the character.
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textEditRangeStart = Position(line: completionPos.line, utf16index: completionPos.utf16index - 1)
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} else {
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// Deleting the character would cross line boundaries. This is not supported by LSP.
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// Fall back to ignoring utf8CodeUnitsToErase.
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// If we discover that multi-lines replacements are often needed, we can add an LSP extension to support multi-line edits.
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textEditRangeStart = completionPos
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}
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} else {
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// We need to delete more than one text character. Do the UTF-8/UTF-16 dance.
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assert(completionPos.line == requestPosition.line)
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// Construct a string index for the edit range start by subtracting the UTF-8 code units to erase from the completion position.
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let line = snapshot.lineTable[completionPos.line]
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let completionPosStringIndex = snapshot.lineTable.stringIndexOf(line: completionPos.line, utf16Column: completionPos.utf16index)!
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let deletionStartStringIndex = line.utf8.index(completionPosStringIndex, offsetBy: -utf8CodeUnitsToErase)
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// Compute the UTF-16 offset of the deletion start range. If the start lies in a previous line, this will be negative
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let deletionStartUtf16Offset = line.utf16.distance(from: line.startIndex, to: deletionStartStringIndex)
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// Check if we are only deleting on one line. LSP does not support deleting over multiple lines.
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if deletionStartUtf16Offset >= 0 {
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// We are only deleting characters on the same line. Construct the corresponding text edit.
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textEditRangeStart = Position(line: completionPos.line, utf16index: deletionStartUtf16Offset)
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} else {
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// Deleting the character would cross line boundaries. This is not supported by LSP.
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// Fall back to ignoring utf8CodeUnitsToErase.
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// If we discover that multi-lines replacements are often needed, we can add an LSP extension to support multi-line edits.
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textEditRangeStart = completionPos
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}
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}
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return TextEdit(range: textEditRangeStart..<requestPosition, newText: newText)
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}
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public func completion(_ req: Request<CompletionRequest>) {
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let keys = self.keys
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queue.async {
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guard let snapshot = self.documentManager.latestSnapshot(req.params.textDocument.uri) else {
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log("failed to find snapshot for url \(req.params.textDocument.uri)")
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req.reply(CompletionList(isIncomplete: true, items: []))
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return
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}
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guard let completionPos = self.adjustCompletionLocation(req.params.position, in: snapshot) else {
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log("invalid completion position \(req.params.position)")
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req.reply(CompletionList(isIncomplete: true, items: []))
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return
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}
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guard let offset = snapshot.utf8Offset(of: completionPos) else {
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log("invalid completion position \(req.params.position) (adjusted: \(completionPos)")
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req.reply(CompletionList(isIncomplete: true, items: []))
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return
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}
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let skreq = SKRequestDictionary(sourcekitd: self.sourcekitd)
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skreq[keys.request] = self.requests.codecomplete
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skreq[keys.offset] = offset
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skreq[keys.sourcefile] = snapshot.document.uri.pseudoPath
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skreq[keys.sourcetext] = snapshot.text
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// FIXME: SourceKit should probably cache this for us.
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if let settings = self.buildSettingsByFile[snapshot.document.uri] {
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skreq[keys.compilerargs] = settings.compilerArguments
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}
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logAsync { _ in skreq.description }
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let handle = self.sourcekitd.send(skreq, self.queue) { [weak self] result in
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guard let self = self else { return }
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guard let dict = result.success else {
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req.reply(.failure(result.failure!))
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return
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}
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guard let completions: SKResponseArray = dict[self.keys.results] else {
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req.reply(CompletionList(isIncomplete: false, items: []))
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return
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}
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var result = CompletionList(isIncomplete: false, items: [])
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let cancelled = !completions.forEach { (i, value) -> Bool in
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guard let name: String = value[self.keys.description] else {
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return true // continue
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}
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var filterName: String? = value[self.keys.name]
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let insertText: String? = value[self.keys.sourcetext]
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let typeName: String? = value[self.keys.typename]
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let clientCompletionCapabilities = self.clientCapabilities.textDocument?.completion
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let clientSupportsSnippets = clientCompletionCapabilities?.completionItem?.snippetSupport == true
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let text = insertText.map {
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self.rewriteSourceKitPlaceholders(inString: $0, clientSupportsSnippets: clientSupportsSnippets)
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}
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let isInsertTextSnippet = clientSupportsSnippets && text != insertText
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let textEdit: TextEdit?
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if let text = text {
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let utf8CodeUnitsToErase: Int = value[self.keys.num_bytes_to_erase] ?? 0
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textEdit = self.computeCompletionTextEdit(completionPos: completionPos, requestPosition: req.params.position, utf8CodeUnitsToErase: utf8CodeUnitsToErase, newText: text, snapshot: snapshot)
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if utf8CodeUnitsToErase != 0, filterName != nil, let textEdit = textEdit {
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// To support the case where the client is doing prefix matching on the TextEdit range,
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// we need to prepend the deleted text to filterText.
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// This also works around a behaviour in VS Code that causes completions to not show up
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// if a '.' is being replaced for Optional completion.
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let startIndex = snapshot.lineTable.stringIndexOf(line: textEdit.range.lowerBound.line, utf16Column: textEdit.range.lowerBound.utf16index)!
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let endIndex = snapshot.lineTable.stringIndexOf(line: completionPos.line, utf16Column: completionPos.utf16index)!
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let filterPrefix = snapshot.text[startIndex..<endIndex]
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filterName = filterPrefix + filterName!
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}
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} else {
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textEdit = nil
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}
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let kind: sourcekitd_uid_t? = value[self.keys.kind]
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result.items.append(CompletionItem(
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label: name,
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kind: kind?.asCompletionItemKind(self.values) ?? .value,
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detail: typeName,
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sortText: nil,
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filterText: filterName,
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textEdit: textEdit,
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insertText: text,
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insertTextFormat: isInsertTextSnippet ? .snippet : .plain,
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deprecated: nil
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))
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return true
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}
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if !cancelled {
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req.reply(result)
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}
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}
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// FIXME: cancellation
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_ = handle
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}
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}
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|
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func rewriteSourceKitPlaceholders(inString string: String, clientSupportsSnippets: Bool) -> String {
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var result = string
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var index = 1
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while let start = result.range(of: EditorPlaceholder.placeholderPrefix) {
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guard let end = result[start.upperBound...].range(of: EditorPlaceholder.placeholderSuffix) else {
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log("invalid placeholder in \(string)", level: .debug)
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return string
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}
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let rawPlaceholder = String(result[start.lowerBound..<end.upperBound])
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guard let displayName = EditorPlaceholder(rawPlaceholder)?.displayName else {
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log("failed to decode placeholder \(rawPlaceholder) in \(string)", level: .debug)
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return string
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}
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let placeholder = clientSupportsSnippets ? "${\(index):\(displayName)}" : ""
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result.replaceSubrange(start.lowerBound..<end.upperBound, with: placeholder)
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index += 1
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}
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return result
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}
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|
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/// Adjust completion position to the start of identifier characters.
|
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func adjustCompletionLocation(_ pos: Position, in snapshot: DocumentSnapshot) -> Position? {
|
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guard pos.line < snapshot.lineTable.count else {
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// Line out of range.
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return nil
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}
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let lineSlice = snapshot.lineTable[pos.line]
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|
let startIndex = lineSlice.startIndex
|
|
|
|
let identifierChars = CharacterSet.alphanumerics.union(CharacterSet(charactersIn: "_"))
|
|
|
|
guard var loc = lineSlice.utf16.index(startIndex, offsetBy: pos.utf16index, limitedBy: lineSlice.endIndex) else {
|
|
// Column out of range.
|
|
return nil
|
|
}
|
|
while loc != startIndex {
|
|
let prev = lineSlice.index(before: loc)
|
|
if !identifierChars.contains(lineSlice.unicodeScalars[prev]) {
|
|
break
|
|
}
|
|
loc = prev
|
|
}
|
|
|
|
// ###aabccccccdddddd
|
|
// ^ ^- loc ^-requestedLoc
|
|
// `- startIndex
|
|
|
|
let adjustedOffset = lineSlice.utf16.distance(from: startIndex, to: loc)
|
|
return Position(line: pos.line, utf16index: adjustedOffset)
|
|
}
|
|
|
|
public func hover(_ req: Request<HoverRequest>) {
|
|
let uri = req.params.textDocument.uri
|
|
let position = req.params.position
|
|
cursorInfo(uri, position..<position) { result in
|
|
guard let cursorInfo: CursorInfo = result.success ?? nil else {
|
|
if let error = result.failure {
|
|
log("cursor info failed \(uri):\(position): \(error)", level: .warning)
|
|
}
|
|
return req.reply(nil)
|
|
}
|
|
|
|
guard let name: String = cursorInfo.symbolInfo.name else {
|
|
// There is a cursor but we don't know how to deal with it.
|
|
req.reply(nil)
|
|
return
|
|
}
|
|
|
|
/// Prepend backslash to `*` and `_`, to prevent them
|
|
/// from being interpreted as markdown.
|
|
func escapeNameMarkdown(_ str: String) -> String {
|
|
return String(str.flatMap({ ($0 == "*" || $0 == "_") ? ["\\", $0] : [$0] }))
|
|
}
|
|
|
|
var result = "# \(escapeNameMarkdown(name))"
|
|
if let doc = cursorInfo.documentationXML {
|
|
result += """
|
|
|
|
\(orLog { try xmlDocumentationToMarkdown(doc) } ?? doc)
|
|
"""
|
|
} else if let annotated: String = cursorInfo.annotatedDeclaration {
|
|
result += """
|
|
|
|
\(orLog { try xmlDocumentationToMarkdown(annotated) } ?? annotated)
|
|
"""
|
|
}
|
|
|
|
req.reply(HoverResponse(contents: .markupContent(MarkupContent(kind: .markdown, value: result)), range: nil))
|
|
}
|
|
}
|
|
|
|
public func symbolInfo(_ req: Request<SymbolInfoRequest>) {
|
|
let uri = req.params.textDocument.uri
|
|
let position = req.params.position
|
|
cursorInfo(uri, position..<position) { result in
|
|
guard let cursorInfo: CursorInfo = result.success ?? nil else {
|
|
if let error = result.failure {
|
|
log("cursor info failed \(uri):\(position): \(error)", level: .warning)
|
|
}
|
|
return req.reply([])
|
|
}
|
|
|
|
req.reply([cursorInfo.symbolInfo])
|
|
}
|
|
}
|
|
|
|
public func documentSymbol(_ req: Request<DocumentSymbolRequest>) {
|
|
let keys = self.keys
|
|
|
|
queue.async {
|
|
guard let snapshot = self.documentManager.latestSnapshot(req.params.textDocument.uri) else {
|
|
log("failed to find snapshot for url \(req.params.textDocument.uri)")
|
|
req.reply(nil)
|
|
return
|
|
}
|
|
|
|
let skreq = SKRequestDictionary(sourcekitd: self.sourcekitd)
|
|
skreq[keys.request] = self.requests.editor_open
|
|
skreq[keys.name] = "DocumentSymbols:" + snapshot.document.uri.pseudoPath
|
|
skreq[keys.sourcetext] = snapshot.text
|
|
skreq[keys.syntactic_only] = 1
|
|
|
|
let handle = self.sourcekitd.send(skreq, self.queue) { [weak self] result in
|
|
guard let self = self else { return }
|
|
guard let dict = result.success else {
|
|
req.reply(.failure(result.failure!))
|
|
return
|
|
}
|
|
guard let results: SKResponseArray = dict[self.keys.substructure] else {
|
|
return req.reply(.documentSymbols([]))
|
|
}
|
|
|
|
func documentSymbol(value: SKResponseDictionary) -> DocumentSymbol? {
|
|
guard let name: String = value[self.keys.name],
|
|
let uid: sourcekitd_uid_t = value[self.keys.kind],
|
|
let kind: SymbolKind = uid.asSymbolKind(self.values),
|
|
let offset: Int = value[self.keys.offset],
|
|
let start: Position = snapshot.positionOf(utf8Offset: offset),
|
|
let length: Int = value[self.keys.length],
|
|
let end: Position = snapshot.positionOf(utf8Offset: offset + length) else {
|
|
return nil
|
|
}
|
|
|
|
let range = start..<end
|
|
let selectionRange: Range<Position>
|
|
if let nameOffset: Int = value[self.keys.nameoffset],
|
|
let nameStart: Position = snapshot.positionOf(utf8Offset: nameOffset),
|
|
let nameLength: Int = value[self.keys.namelength],
|
|
let nameEnd: Position = snapshot.positionOf(utf8Offset: nameOffset + nameLength) {
|
|
selectionRange = nameStart..<nameEnd
|
|
} else {
|
|
selectionRange = range
|
|
}
|
|
|
|
let children: [DocumentSymbol]?
|
|
if let substructure: SKResponseArray = value[self.keys.substructure] {
|
|
children = documentSymbols(array: substructure)
|
|
} else {
|
|
children = nil
|
|
}
|
|
return DocumentSymbol(name: name,
|
|
detail: nil,
|
|
kind: kind,
|
|
deprecated: nil,
|
|
range: range,
|
|
selectionRange: selectionRange,
|
|
children: children)
|
|
}
|
|
|
|
func documentSymbols(array: SKResponseArray) -> [DocumentSymbol] {
|
|
var result: [DocumentSymbol] = []
|
|
array.forEach { (i: Int, value: SKResponseDictionary) in
|
|
if let documentSymbol = documentSymbol(value: value) {
|
|
result.append(documentSymbol)
|
|
} else if let substructure: SKResponseArray = value[self.keys.substructure] {
|
|
result += documentSymbols(array: substructure)
|
|
}
|
|
return true
|
|
}
|
|
return result
|
|
}
|
|
|
|
req.reply(.documentSymbols(documentSymbols(array: results)))
|
|
}
|
|
// FIXME: cancellation
|
|
_ = handle
|
|
}
|
|
}
|
|
|
|
public func documentColor(_ req: Request<DocumentColorRequest>) {
|
|
let keys = self.keys
|
|
|
|
queue.async {
|
|
guard let snapshot = self.documentManager.latestSnapshot(req.params.textDocument.uri) else {
|
|
log("failed to find snapshot for url \(req.params.textDocument.uri)")
|
|
req.reply(nil)
|
|
return
|
|
}
|
|
|
|
let skreq = SKRequestDictionary(sourcekitd: self.sourcekitd)
|
|
skreq[keys.request] = self.requests.editor_open
|
|
skreq[keys.name] = "DocumentColor:" + snapshot.document.uri.pseudoPath
|
|
skreq[keys.sourcetext] = snapshot.text
|
|
skreq[keys.syntactic_only] = 1
|
|
|
|
let handle = self.sourcekitd.send(skreq, self.queue) { [weak self] result in
|
|
guard let self = self else { return }
|
|
guard let dict = result.success else {
|
|
req.reply(.failure(result.failure!))
|
|
return
|
|
}
|
|
|
|
guard let results: SKResponseArray = dict[self.keys.substructure] else {
|
|
return req.reply([])
|
|
}
|
|
|
|
func colorInformation(dict: SKResponseDictionary) -> ColorInformation? {
|
|
guard let kind: sourcekitd_uid_t = dict[self.keys.kind],
|
|
kind == self.values.expr_object_literal,
|
|
let name: String = dict[self.keys.name],
|
|
name == "colorLiteral",
|
|
let offset: Int = dict[self.keys.offset],
|
|
let start: Position = snapshot.positionOf(utf8Offset: offset),
|
|
let length: Int = dict[self.keys.length],
|
|
let end: Position = snapshot.positionOf(utf8Offset: offset + length),
|
|
let substructure: SKResponseArray = dict[self.keys.substructure] else {
|
|
return nil
|
|
}
|
|
var red, green, blue, alpha: Double?
|
|
substructure.forEach{ (i: Int, value: SKResponseDictionary) in
|
|
guard let name: String = value[self.keys.name],
|
|
let bodyoffset: Int = value[self.keys.bodyoffset],
|
|
let bodylength: Int = value[self.keys.bodylength] else {
|
|
return true
|
|
}
|
|
let view = snapshot.text.utf8
|
|
let bodyStart = view.index(view.startIndex, offsetBy: bodyoffset)
|
|
let bodyEnd = view.index(view.startIndex, offsetBy: bodyoffset+bodylength)
|
|
let value = String(view[bodyStart..<bodyEnd]).flatMap(Double.init)
|
|
switch name {
|
|
case "red":
|
|
red = value
|
|
case "green":
|
|
green = value
|
|
case "blue":
|
|
blue = value
|
|
case "alpha":
|
|
alpha = value
|
|
default:
|
|
break
|
|
}
|
|
return true
|
|
}
|
|
if let red = red,
|
|
let green = green,
|
|
let blue = blue,
|
|
let alpha = alpha {
|
|
let color = Color(red: red, green: green, blue: blue, alpha: alpha)
|
|
return ColorInformation(range: start..<end, color: color)
|
|
} else {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func colorInformation(array: SKResponseArray) -> [ColorInformation] {
|
|
var result: [ColorInformation] = []
|
|
array.forEach { (i: Int, value: SKResponseDictionary) in
|
|
if let documentSymbol = colorInformation(dict: value) {
|
|
result.append(documentSymbol)
|
|
} else if let substructure: SKResponseArray = value[self.keys.substructure] {
|
|
result += colorInformation(array: substructure)
|
|
}
|
|
return true
|
|
}
|
|
return result
|
|
}
|
|
|
|
req.reply(colorInformation(array: results))
|
|
}
|
|
// FIXME: cancellation
|
|
_ = handle
|
|
}
|
|
}
|
|
|
|
public func colorPresentation(_ req: Request<ColorPresentationRequest>) {
|
|
let color = req.params.color
|
|
// Empty string as a label breaks VSCode color picker
|
|
let label = "Color Literal"
|
|
let newText = "#colorLiteral(red: \(color.red), green: \(color.green), blue: \(color.blue), alpha: \(color.alpha))"
|
|
let textEdit = TextEdit(range: req.params.range, newText: newText)
|
|
let presentation = ColorPresentation(label: label, textEdit: textEdit, additionalTextEdits: nil)
|
|
req.reply([presentation])
|
|
}
|
|
|
|
public func documentSymbolHighlight(_ req: Request<DocumentHighlightRequest>) {
|
|
let keys = self.keys
|
|
|
|
queue.async {
|
|
guard let snapshot = self.documentManager.latestSnapshot(req.params.textDocument.uri) else {
|
|
log("failed to find snapshot for url \(req.params.textDocument.uri)")
|
|
req.reply(nil)
|
|
return
|
|
}
|
|
|
|
guard let offset = snapshot.utf8Offset(of: req.params.position) else {
|
|
log("invalid position \(req.params.position)")
|
|
req.reply(nil)
|
|
return
|
|
}
|
|
|
|
let skreq = SKRequestDictionary(sourcekitd: self.sourcekitd)
|
|
skreq[keys.request] = self.requests.relatedidents
|
|
skreq[keys.offset] = offset
|
|
skreq[keys.sourcefile] = snapshot.document.uri.pseudoPath
|
|
|
|
// FIXME: SourceKit should probably cache this for us.
|
|
if let settings = self.buildSettingsByFile[snapshot.document.uri] {
|
|
skreq[keys.compilerargs] = settings.compilerArguments
|
|
}
|
|
|
|
let handle = self.sourcekitd.send(skreq, self.queue) { [weak self] result in
|
|
guard let self = self else { return }
|
|
guard let dict = result.success else {
|
|
req.reply(.failure(result.failure!))
|
|
return
|
|
}
|
|
|
|
guard let results: SKResponseArray = dict[self.keys.results] else {
|
|
return req.reply([])
|
|
}
|
|
|
|
var highlights: [DocumentHighlight] = []
|
|
|
|
results.forEach { _, value in
|
|
if let offset: Int = value[self.keys.offset],
|
|
let start: Position = snapshot.positionOf(utf8Offset: offset),
|
|
let length: Int = value[self.keys.length],
|
|
let end: Position = snapshot.positionOf(utf8Offset: offset + length)
|
|
{
|
|
highlights.append(DocumentHighlight(
|
|
range: start..<end,
|
|
kind: .read // unknown
|
|
))
|
|
}
|
|
return true
|
|
}
|
|
|
|
req.reply(highlights)
|
|
}
|
|
|
|
// FIXME: cancellation
|
|
_ = handle
|
|
}
|
|
}
|
|
|
|
public func foldingRange(_ req: Request<FoldingRangeRequest>) {
|
|
let keys = self.keys
|
|
|
|
queue.async {
|
|
guard let snapshot = self.documentManager.latestSnapshot(req.params.textDocument.uri) else {
|
|
log("failed to find snapshot for url \(req.params.textDocument.uri)")
|
|
req.reply(nil)
|
|
return
|
|
}
|
|
|
|
let skreq = SKRequestDictionary(sourcekitd: self.sourcekitd)
|
|
skreq[keys.request] = self.requests.editor_open
|
|
skreq[keys.name] = "FoldingRanges:" + snapshot.document.uri.pseudoPath
|
|
skreq[keys.sourcetext] = snapshot.text
|
|
skreq[keys.syntactic_only] = 1
|
|
|
|
let handle = self.sourcekitd.send(skreq, self.queue) { [weak self] result in
|
|
guard let self = self else { return }
|
|
guard let dict = result.success else {
|
|
req.reply(.failure(result.failure!))
|
|
return
|
|
}
|
|
|
|
guard let syntaxMap: SKResponseArray = dict[self.keys.syntaxmap],
|
|
let substructure: SKResponseArray = dict[self.keys.substructure] else {
|
|
return req.reply([])
|
|
}
|
|
|
|
var ranges: [FoldingRange] = []
|
|
|
|
var hasReachedLimit: Bool {
|
|
let capabilities = self.clientCapabilities.textDocument?.foldingRange
|
|
guard let rangeLimit = capabilities?.rangeLimit else {
|
|
return false
|
|
}
|
|
return ranges.count >= rangeLimit
|
|
}
|
|
|
|
// If the limit is less than one, do nothing.
|
|
guard hasReachedLimit == false else {
|
|
req.reply([])
|
|
return
|
|
}
|
|
|
|
// Merge successive comments into one big comment by adding their lengths.
|
|
var currentComment: (offset: Int, length: Int)? = nil
|
|
|
|
syntaxMap.forEach { _, value in
|
|
if let kind: sourcekitd_uid_t = value[self.keys.kind],
|
|
kind.isCommentKind(self.values),
|
|
let offset: Int = value[self.keys.offset],
|
|
let length: Int = value[self.keys.length]
|
|
{
|
|
if let comment = currentComment, comment.offset + comment.length == offset {
|
|
currentComment!.length += length
|
|
return true
|
|
}
|
|
if let comment = currentComment {
|
|
self.addFoldingRange(offset: comment.offset, length: comment.length, kind: .comment, in: snapshot, toArray: &ranges)
|
|
}
|
|
currentComment = (offset: offset, length: length)
|
|
}
|
|
return hasReachedLimit == false
|
|
}
|
|
|
|
// Add the last stored comment.
|
|
if let comment = currentComment, hasReachedLimit == false {
|
|
self.addFoldingRange(offset: comment.offset, length: comment.length, kind: .comment, in: snapshot, toArray: &ranges)
|
|
currentComment = nil
|
|
}
|
|
|
|
var structureStack: [SKResponseArray] = [substructure]
|
|
while !hasReachedLimit, let substructure = structureStack.popLast() {
|
|
substructure.forEach { _, value in
|
|
if let offset: Int = value[self.keys.bodyoffset],
|
|
let length: Int = value[self.keys.bodylength],
|
|
length > 0
|
|
{
|
|
self.addFoldingRange(offset: offset, length: length, in: snapshot, toArray: &ranges)
|
|
if hasReachedLimit {
|
|
return false
|
|
}
|
|
}
|
|
if let substructure: SKResponseArray = value[self.keys.substructure] {
|
|
structureStack.append(substructure)
|
|
}
|
|
return true
|
|
}
|
|
}
|
|
|
|
ranges.sort()
|
|
req.reply(ranges)
|
|
}
|
|
|
|
// FIXME: cancellation
|
|
_ = handle
|
|
}
|
|
}
|
|
|
|
func addFoldingRange(offset: Int, length: Int, kind: FoldingRangeKind? = nil, in snapshot: DocumentSnapshot, toArray ranges: inout [FoldingRange]) {
|
|
guard let start: Position = snapshot.positionOf(utf8Offset: offset),
|
|
let end: Position = snapshot.positionOf(utf8Offset: offset + length) else {
|
|
log("folding range failed to retrieve position of \(snapshot.document.uri): \(offset)-\(offset + length)", level: .warning)
|
|
return
|
|
}
|
|
let capabilities = clientCapabilities.textDocument?.foldingRange
|
|
let range: FoldingRange
|
|
// If the client only supports folding full lines, ignore the end character's line.
|
|
if capabilities?.lineFoldingOnly == true {
|
|
let lastLineToFold = end.line - 1
|
|
if lastLineToFold <= start.line {
|
|
return
|
|
} else {
|
|
range = FoldingRange(startLine: start.line,
|
|
startUTF16Index: nil,
|
|
endLine: lastLineToFold,
|
|
endUTF16Index: nil,
|
|
kind: kind)
|
|
}
|
|
} else {
|
|
range = FoldingRange(startLine: start.line,
|
|
startUTF16Index: start.utf16index,
|
|
endLine: end.line,
|
|
endUTF16Index: end.utf16index,
|
|
kind: kind)
|
|
}
|
|
ranges.append(range)
|
|
}
|
|
|
|
public func codeAction(_ req: Request<CodeActionRequest>) {
|
|
let providersAndKinds: [(provider: CodeActionProvider, kind: CodeActionKind)] = [
|
|
(retrieveRefactorCodeActions, .refactor)
|
|
//TODO: Implement the providers.
|
|
//(retrieveQuickFixCodeActions, .quickFix)
|
|
]
|
|
let wantedActionKinds = req.params.context.only
|
|
let providers = providersAndKinds.filter { wantedActionKinds?.contains($0.1) != false }
|
|
retrieveCodeActions(req, providers: providers.map { $0.provider }) { result in
|
|
switch result {
|
|
case .success(let codeActions):
|
|
let capabilities = self.clientCapabilities.textDocument?.codeAction
|
|
let response = CodeActionRequestResponse(codeActions: codeActions,
|
|
clientCapabilities: capabilities)
|
|
req.reply(response)
|
|
case .failure(let error):
|
|
req.reply(.failure(error))
|
|
}
|
|
}
|
|
}
|
|
|
|
func retrieveCodeActions(_ req: Request<CodeActionRequest>, providers: [CodeActionProvider], completion: @escaping CodeActionProviderCompletion) {
|
|
guard providers.isEmpty == false else {
|
|
completion(.success([]))
|
|
return
|
|
}
|
|
var codeActions = [CodeAction]()
|
|
let dispatchGroup = DispatchGroup()
|
|
(0..<providers.count).forEach { _ in dispatchGroup.enter() }
|
|
dispatchGroup.notify(queue: queue) {
|
|
completion(.success(codeActions))
|
|
}
|
|
for i in 0..<providers.count {
|
|
self.queue.async {
|
|
providers[i](req.params) { result in
|
|
defer { dispatchGroup.leave() }
|
|
guard case .success(let actions) = result else {
|
|
return
|
|
}
|
|
codeActions += actions
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func retrieveRefactorCodeActions(_ params: CodeActionRequest, completion: @escaping CodeActionProviderCompletion) {
|
|
let additionalCursorInfoParameters: ((SKRequestDictionary) -> Void) = { skreq in
|
|
skreq[self.keys.retrieve_refactor_actions] = 1
|
|
}
|
|
|
|
_cursorInfo(
|
|
params.textDocument.uri,
|
|
params.range,
|
|
additionalParameters: additionalCursorInfoParameters)
|
|
{ result in
|
|
guard let dict: CursorInfo = result.success ?? nil else {
|
|
if let failure = result.failure {
|
|
let message = "failed to find refactor actions: \(failure)"
|
|
log(message)
|
|
completion(.failure(.unknown(message)))
|
|
} else {
|
|
completion(.failure(.unknown("CursorInfo failed.")))
|
|
}
|
|
return
|
|
}
|
|
guard let refactorActions = dict.refactorActions else {
|
|
completion(.success([]))
|
|
return
|
|
}
|
|
let codeActions: [CodeAction] = refactorActions.compactMap {
|
|
do {
|
|
let lspCommand = try $0.asCommand()
|
|
return CodeAction(title: $0.title, kind: .refactor, command: lspCommand)
|
|
} catch {
|
|
log("Failed to convert SwiftCommand to Command type: \(error)", level: .error)
|
|
return nil
|
|
}
|
|
}
|
|
completion(.success(codeActions))
|
|
}
|
|
}
|
|
|
|
public func executeCommand(_ req: Request<ExecuteCommandRequest>) {
|
|
let params = req.params
|
|
//TODO: If there's support for several types of commands, we might need to structure this similarly to the code actions request.
|
|
guard let swiftCommand = params.swiftCommand(ofType: SemanticRefactorCommand.self) else {
|
|
let message = "semantic refactoring: unknown command \(params.command)"
|
|
log(message, level: .warning)
|
|
return req.reply(.failure(.unknown(message)))
|
|
}
|
|
let uri = swiftCommand.textDocument.uri
|
|
semanticRefactoring(swiftCommand) { result in
|
|
switch result {
|
|
case .success(let refactor):
|
|
let edit = refactor.edit
|
|
self.applyEdit(label: refactor.title, edit: edit) { editResult in
|
|
switch editResult {
|
|
case .success:
|
|
req.reply(edit.encodeToLSPAny())
|
|
case .failure(let error):
|
|
req.reply(.failure(error))
|
|
}
|
|
}
|
|
case .failure(let error):
|
|
let message = "semantic refactoring failed \(uri): \(error)"
|
|
log(message, level: .warning)
|
|
return req.reply(.failure(.unknown(message)))
|
|
}
|
|
}
|
|
}
|
|
|
|
func applyEdit(label: String, edit: WorkspaceEdit, completion: @escaping (LSPResult<ApplyEditResponse>) -> Void) {
|
|
let req = ApplyEditRequest(label: label, edit: edit)
|
|
let handle = client.send(req, queue: queue) { reply in
|
|
switch reply {
|
|
case .success(let response) where response.applied == false:
|
|
let reason: String
|
|
if let failureReason = response.failureReason {
|
|
reason = " reason: \(failureReason)"
|
|
} else {
|
|
reason = ""
|
|
}
|
|
log("client refused to apply edit for \(label)!\(reason)", level: .warning)
|
|
case .failure(let error):
|
|
log("applyEdit failed: \(error)", level: .warning)
|
|
default:
|
|
break
|
|
}
|
|
completion(reply)
|
|
}
|
|
|
|
// FIXME: cancellation
|
|
_ = handle
|
|
}
|
|
}
|
|
|
|
extension DocumentSnapshot {
|
|
|
|
func utf8Offset(of pos: Position) -> Int? {
|
|
return lineTable.utf8OffsetOf(line: pos.line, utf16Column: pos.utf16index)
|
|
}
|
|
|
|
func utf8OffsetRange(of range: Range<Position>) -> Range<Int>? {
|
|
guard let startOffset = utf8Offset(of: range.lowerBound),
|
|
let endOffset = utf8Offset(of: range.upperBound) else
|
|
{
|
|
return nil
|
|
}
|
|
return startOffset..<endOffset
|
|
}
|
|
|
|
func positionOf(utf8Offset: Int) -> Position? {
|
|
return lineTable.lineAndUTF16ColumnOf(utf8Offset: utf8Offset).map {
|
|
Position(line: $0.line, utf16index: $0.utf16Column)
|
|
}
|
|
}
|
|
|
|
func positionOf(zeroBasedLine: Int, utf8Column: Int) -> Position? {
|
|
return lineTable.utf16ColumnAt(line: zeroBasedLine, utf8Column: utf8Column).map {
|
|
Position(line: zeroBasedLine, utf16index: $0)
|
|
}
|
|
}
|
|
}
|
|
|
|
func makeLocalSwiftServer(
|
|
client: MessageHandler, sourcekitd: AbsolutePath, buildSettings: BuildSystem?,
|
|
clientCapabilities: ClientCapabilities?) throws -> ToolchainLanguageServer {
|
|
let connectionToClient = LocalConnection()
|
|
|
|
let server = try SwiftLanguageServer(
|
|
client: connectionToClient,
|
|
sourcekitd: sourcekitd,
|
|
buildSystem: buildSettings ?? BuildSystemList(),
|
|
clientCapabilities: clientCapabilities ?? ClientCapabilities(workspace: nil, textDocument: nil)
|
|
)
|
|
connectionToClient.start(handler: client)
|
|
return server
|
|
}
|
|
|
|
extension sourcekitd_uid_t {
|
|
func isCommentKind(_ vals: sourcekitd_values) -> Bool {
|
|
switch self {
|
|
case vals.syntaxtype_comment, vals.syntaxtype_comment_marker, vals.syntaxtype_comment_url:
|
|
return true
|
|
default:
|
|
return isDocCommentKind(vals)
|
|
}
|
|
}
|
|
|
|
func isDocCommentKind(_ vals: sourcekitd_values) -> Bool {
|
|
return self == vals.syntaxtype_doccomment || self == vals.syntaxtype_doccomment_field
|
|
}
|
|
|
|
func asCompletionItemKind(_ vals: sourcekitd_values) -> CompletionItemKind? {
|
|
switch self {
|
|
case vals.kind_keyword:
|
|
return .keyword
|
|
case vals.decl_module:
|
|
return .module
|
|
case vals.decl_class:
|
|
return .class
|
|
case vals.decl_struct:
|
|
return .struct
|
|
case vals.decl_enum:
|
|
return .enum
|
|
case vals.decl_enumelement:
|
|
return .enumMember
|
|
case vals.decl_protocol:
|
|
return .interface
|
|
case vals.decl_associatedtype:
|
|
return .typeParameter
|
|
case vals.decl_typealias:
|
|
return .typeParameter // FIXME: is there a better choice?
|
|
case vals.decl_generic_type_param:
|
|
return .typeParameter
|
|
case vals.decl_function_constructor:
|
|
return .constructor
|
|
case vals.decl_function_destructor:
|
|
return .value // FIXME: is there a better choice?
|
|
case vals.decl_function_subscript:
|
|
return .method // FIXME: is there a better choice?
|
|
case vals.decl_function_method_static:
|
|
return .method
|
|
case vals.decl_function_method_instance:
|
|
return .method
|
|
case vals.decl_function_operator_prefix,
|
|
vals.decl_function_operator_postfix,
|
|
vals.decl_function_operator_infix:
|
|
return .operator
|
|
case vals.decl_precedencegroup:
|
|
return .value
|
|
case vals.decl_function_free:
|
|
return .function
|
|
case vals.decl_var_static, vals.decl_var_class:
|
|
return .property
|
|
case vals.decl_var_instance:
|
|
return .property
|
|
case vals.decl_var_local,
|
|
vals.decl_var_global,
|
|
vals.decl_var_parameter:
|
|
return .variable
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func asSymbolKind(_ vals: sourcekitd_values) -> SymbolKind? {
|
|
switch self {
|
|
case vals.decl_class:
|
|
return .class
|
|
case vals.decl_function_method_instance,
|
|
vals.decl_function_method_static,
|
|
vals.decl_function_method_class:
|
|
return .method
|
|
case vals.decl_var_instance,
|
|
vals.decl_var_static,
|
|
vals.decl_var_class:
|
|
return .property
|
|
case vals.decl_enum:
|
|
return .enum
|
|
case vals.decl_enumelement:
|
|
return .enumMember
|
|
case vals.decl_protocol:
|
|
return .interface
|
|
case vals.decl_function_free:
|
|
return .function
|
|
case vals.decl_var_global,
|
|
vals.decl_var_local:
|
|
return .variable
|
|
case vals.decl_struct:
|
|
return .struct
|
|
case vals.decl_generic_type_param:
|
|
return .typeParameter
|
|
case vals.decl_extension:
|
|
// There are no extensions in LSP, so I return something vaguely similar
|
|
return .namespace
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
}
|