import { IExtUri } from "../../../base/common/resources.js";
import { URI } from "../../../base/common/uri.js";
export declare const IUriIdentityService: import("../../instantiation/common/instantiation.js").ServiceIdentifier<IUriIdentityService>;
export interface IUriIdentityService {
    readonly _serviceBrand: undefined;
    /**
    * Uri extensions that are aware of casing.
    */
    readonly extUri: IExtUri;
    /**
    * Returns a canonical uri for the given resource. Different uris can point to the same
    * resource. That's because of casing or missing normalization, e.g the following uris
    * are different but refer to the same document (because windows paths are not case-sensitive)
    *
    * ```txt
    * file:///c:/foo/bar.txt
    * file:///c:/FOO/BAR.txt
    * ```
    *
    * This function should be invoked when feeding uris into the system that represent the truth,
    * e.g document uris or marker-to-document associations etc. This function should NOT be called
    * to pretty print a label nor to sanitize a uri.
    *
    * Samples:
    *
    * | in | out | |
    * |---|---|---|
    * | `file:///foo/bar/../bar` | `file:///foo/bar` | n/a |
    * | `file:///foo/bar/../bar#frag` | `file:///foo/bar#frag` | keep fragment |
    * | `file:///foo/BAR` | `file:///foo/bar` | assume ignore case |
    * | `file:///foo/bar/../BAR?q=2` | `file:///foo/BAR?q=2` | query makes it a different document |
    */
    asCanonicalUri(uri: URI): URI;
}