import type { LspClientManager } from "../client-manager.ts";
import type { LspDocumentManager } from "../document-manager.ts";
import type { Location, Range } from "../types.ts";
/**
 * Resolve language ID from a file path. Throws if the extension is unsupported.
 */
export declare function extractLanguageId(filePath: string): string;
/**
 * Format a Location as a markdown link: `file://path Lstart:col-end:col`
 */
export declare function formatLocation(loc: Location): string;
/**
 * Format a Range as `L{line}:{char}-L{line}:{char}` (0-based).
 */
export declare function formatRange(range: Range): string;
/**
 * Map DiagnosticSeverity number to human-readable label.
 */
export declare function formatSeverity(severity: number): string;
/**
 * Map SymbolKind number to human-readable name.
 */
export declare function formatSymbolKind(kind: number): string;
/**
 * Map CompletionItemKind number to human-readable name.
 */
export declare function formatCompletionKind(kind: number): string;
/**
 * Map DocumentHighlightKind number to human-readable label.
 */
export declare function formatDocumentHighlightKind(kind: number): string;
/**
 * Ensure a document is synced with its LSP server. Throws if the file doesn't
 * exist or the language is not supported.
 */
export declare function ensureSynced(filePath: string, docManager: LspDocumentManager, client: LspClientManager, languageId: string): Promise<void>;
/**
 * Convert an absolute file path to a `file://` URI.
 */
export declare function fileUri(filePath: string): string;
/**
 * Check whether the server for a given language supports a specific
 * capability (e.g. `"textDocument.typeDefinition"`). Returns true if
 * the capability value is truthy.
 */
export declare function checkCapability(languageId: string, client: LspClientManager, capabilityPath: string): boolean;
/**
 * Build a standard error message for an unsupported capability.
 */
export declare function capabilityNotSupported(feature: string): string;
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