/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
define(["require", "exports", "vs/base/common/platform", "vs/base/common/path"], function (require, exports, platform_1, paths) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.uriToFsPath = exports.URI = void 0;
    const _schemePattern = /^\w[\w\d+.-]*$/;
    const _singleSlashStart = /^\//;
    const _doubleSlashStart = /^\/\//;
    function _validateUri(ret, _strict) {
        // scheme, must be set
        if (!ret.scheme && _strict) {
            throw new Error(`[UriError]: Scheme is missing: {scheme: "", authority: "${ret.authority}", path: "${ret.path}", query: "${ret.query}", fragment: "${ret.fragment}"}`);
        }
        // scheme, https://tools.ietf.org/html/rfc3986#section-3.1
        // ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
        if (ret.scheme && !_schemePattern.test(ret.scheme)) {
            throw new Error('[UriError]: Scheme contains illegal characters.');
        }
        // path, http://tools.ietf.org/html/rfc3986#section-3.3
        // If a URI contains an authority component, then the path component
        // must either be empty or begin with a slash ("/") character.  If a URI
        // does not contain an authority component, then the path cannot begin
        // with two slash characters ("//").
        if (ret.path) {
            if (ret.authority) {
                if (!_singleSlashStart.test(ret.path)) {
                    throw new Error('[UriError]: If a URI contains an authority component, then the path component must either be empty or begin with a slash ("/") character');
                }
            }
            else {
                if (_doubleSlashStart.test(ret.path)) {
                    throw new Error('[UriError]: If a URI does not contain an authority component, then the path cannot begin with two slash characters ("//")');
                }
            }
        }
    }
    // for a while we allowed uris *without* schemes and this is the migration
    // for them, e.g. an uri without scheme and without strict-mode warns and falls
    // back to the file-scheme. that should cause the least carnage and still be a
    // clear warning
    function _schemeFix(scheme, _strict) {
        if (!scheme && !_strict) {
            return 'file';
        }
        return scheme;
    }
    // implements a bit of https://tools.ietf.org/html/rfc3986#section-5
    function _referenceResolution(scheme, path) {
        // the slash-character is our 'default base' as we don't
        // support constructing URIs relative to other URIs. This
        // also means that we alter and potentially break paths.
        // see https://tools.ietf.org/html/rfc3986#section-5.1.4
        switch (scheme) {
            case 'https':
            case 'http':
            case 'file':
                if (!path) {
                    path = _slash;
                }
                else if (path[0] !== _slash) {
                    path = _slash + path;
                }
                break;
        }
        return path;
    }
    const _empty = '';
    const _slash = '/';
    const _regexp = /^(([^:/?#]+?):)?(\/\/([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?/;
    /**
     * Uniform Resource Identifier (URI) http://tools.ietf.org/html/rfc3986.
     * This class is a simple parser which creates the basic component parts
     * (http://tools.ietf.org/html/rfc3986#section-3) with minimal validation
     * and encoding.
     *
     * ```txt
     *       foo://example.com:8042/over/there?name=ferret#nose
     *       \_/   \______________/\_________/ \_________/ \__/
     *        |           |            |            |        |
     *     scheme     authority       path        query   fragment
     *        |   _____________________|__
     *       / \ /                        \
     *       urn:example:animal:ferret:nose
     * ```
     */
    class URI {
        /**
         * @internal
         */
        constructor(schemeOrData, authority, path, query, fragment, _strict = false) {
            if (typeof schemeOrData === 'object') {
                this.scheme = schemeOrData.scheme || _empty;
                this.authority = schemeOrData.authority || _empty;
                this.path = schemeOrData.path || _empty;
                this.query = schemeOrData.query || _empty;
                this.fragment = schemeOrData.fragment || _empty;
                // no validation because it's this URI
                // that creates uri components.
                // _validateUri(this);
            }
            else {
                this.scheme = _schemeFix(schemeOrData, _strict);
                this.authority = authority || _empty;
                this.path = _referenceResolution(this.scheme, path || _empty);
                this.query = query || _empty;
                this.fragment = fragment || _empty;
                _validateUri(this, _strict);
            }
        }
        static isUri(thing) {
            if (thing instanceof URI) {
                return true;
            }
            if (!thing) {
                return false;
            }
            return typeof thing.authority === 'string'
                && typeof thing.fragment === 'string'
                && typeof thing.path === 'string'
                && typeof thing.query === 'string'
                && typeof thing.scheme === 'string'
                && typeof thing.fsPath === 'function'
                && typeof thing.with === 'function'
                && typeof thing.toString === 'function';
        }
        // ---- filesystem path -----------------------
        /**
         * Returns a string representing the corresponding file system path of this URI.
         * Will handle UNC paths, normalizes windows drive letters to lower-case, and uses the
         * platform specific path separator.
         *
         * * Will *not* validate the path for invalid characters and semantics.
         * * Will *not* look at the scheme of this URI.
         * * The result shall *not* be used for display purposes but for accessing a file on disk.
         *
         *
         * The *difference* to `URI#path` is the use of the platform specific separator and the handling
         * of UNC paths. See the below sample of a file-uri with an authority (UNC path).
         *
         * ```ts
            const u = URI.parse('file://server/c$/folder/file.txt')
            u.authority === 'server'
            u.path === '/shares/c$/file.txt'
            u.fsPath === '\\server\c$\folder\file.txt'
        ```
         *
         * Using `URI#path` to read a file (using fs-apis) would not be enough because parts of the path,
         * namely the server name, would be missing. Therefore `URI#fsPath` exists - it's sugar to ease working
         * with URIs that represent files on disk (`file` scheme).
         */
        get fsPath() {
            // if (this.scheme !== 'file') {
            // 	console.warn(`[UriError] calling fsPath with scheme ${this.scheme}`);
            // }
            return uriToFsPath(this, false);
        }
        // ---- modify to new -------------------------
        with(change) {
            if (!change) {
                return this;
            }
            let { scheme, authority, path, query, fragment } = change;
            if (scheme === undefined) {
                scheme = this.scheme;
            }
            else if (scheme === null) {
                scheme = _empty;
            }
            if (authority === undefined) {
                authority = this.authority;
            }
            else if (authority === null) {
                authority = _empty;
            }
            if (path === undefined) {
                path = this.path;
            }
            else if (path === null) {
                path = _empty;
            }
            if (query === undefined) {
                query = this.query;
            }
            else if (query === null) {
                query = _empty;
            }
            if (fragment === undefined) {
                fragment = this.fragment;
            }
            else if (fragment === null) {
                fragment = _empty;
            }
            if (scheme === this.scheme
                && authority === this.authority
                && path === this.path
                && query === this.query
                && fragment === this.fragment) {
                return this;
            }
            return new Uri(scheme, authority, path, query, fragment);
        }
        // ---- parse & validate ------------------------
        /**
         * Creates a new URI from a string, e.g. `http://www.msft.com/some/path`,
         * `file:///usr/home`, or `scheme:with/path`.
         *
         * @param value A string which represents an URI (see `URI#toString`).
         */
        static parse(value, _strict = false) {
            const match = _regexp.exec(value);
            if (!match) {
                return new Uri(_empty, _empty, _empty, _empty, _empty);
            }
            return new Uri(match[2] || _empty, percentDecode(match[4] || _empty), percentDecode(match[5] || _empty), percentDecode(match[7] || _empty), percentDecode(match[9] || _empty), _strict);
        }
        /**
         * Creates a new URI from a file system path, e.g. `c:\my\files`,
         * `/usr/home`, or `\\server\share\some\path`.
         *
         * The *difference* between `URI#parse` and `URI#file` is that the latter treats the argument
         * as path, not as stringified-uri. E.g. `URI.file(path)` is **not the same as**
         * `URI.parse('file://' + path)` because the path might contain characters that are
         * interpreted (# and ?). See the following sample:
         * ```ts
        const good = URI.file('/coding/c#/project1');
        good.scheme === 'file';
        good.path === '/coding/c#/project1';
        good.fragment === '';
        const bad = URI.parse('file://' + '/coding/c#/project1');
        bad.scheme === 'file';
        bad.path === '/coding/c'; // path is now broken
        bad.fragment === '/project1';
        ```
         *
         * @param path A file system path (see `URI#fsPath`)
         */
        static file(path) {
            let authority = _empty;
            // normalize to fwd-slashes on windows,
            // on other systems bwd-slashes are valid
            // filename character, eg /f\oo/ba\r.txt
            if (platform_1.isWindows) {
                path = path.replace(/\\/g, _slash);
            }
            // check for authority as used in UNC shares
            // or use the path as given
            if (path[0] === _slash && path[1] === _slash) {
                const idx = path.indexOf(_slash, 2);
                if (idx === -1) {
                    authority = path.substring(2);
                    path = _slash;
                }
                else {
                    authority = path.substring(2, idx);
                    path = path.substring(idx) || _slash;
                }
            }
            return new Uri('file', authority, path, _empty, _empty);
        }
        static from(components) {
            return new Uri(components.scheme, components.authority, components.path, components.query, components.fragment);
        }
        /**
         * Join a URI path with path fragments and normalizes the resulting path.
         *
         * @param uri The input URI.
         * @param pathFragment The path fragment to add to the URI path.
         * @returns The resulting URI.
         */
        static joinPath(uri, ...pathFragment) {
            if (!uri.path) {
                throw new Error(`[UriError]: cannot call joinPaths on URI without path`);
            }
            let newPath;
            if (platform_1.isWindows && uri.scheme === 'file') {
                newPath = URI.file(paths.win32.join(uriToFsPath(uri, true), ...pathFragment)).path;
            }
            else {
                newPath = paths.posix.join(uri.path, ...pathFragment);
            }
            return uri.with({ path: newPath });
        }
        // ---- printing/externalize ---------------------------
        /**
         * Creates a string representation for this URI. It's guaranteed that calling
         * `URI.parse` with the result of this function creates an URI which is equal
         * to this URI.
         *
         * * The result shall *not* be used for display purposes but for externalization or transport.
         * * The result will be encoded using the percentage encoding and encoding happens mostly
         * ignore the scheme-specific encoding rules.
         *
         * @param skipEncoding Do not encode the result, default is `false`
         */
        toString(skipEncoding = false) {
            return _asFormatted(this, skipEncoding);
        }
        toJSON() {
            return this;
        }
        static revive(data) {
            if (!data) {
                return data;
            }
            else if (data instanceof URI) {
                return data;
            }
            else {
                const result = new Uri(data);
                result._formatted = data.external;
                result._fsPath = data._sep === _pathSepMarker ? data.fsPath : null;
                return result;
            }
        }
    }
    exports.URI = URI;
    const _pathSepMarker = platform_1.isWindows ? 1 : undefined;
    // This class exists so that URI is compatibile with vscode.Uri (API).
    class Uri extends URI {
        constructor() {
            super(...arguments);
            this._formatted = null;
            this._fsPath = null;
        }
        get fsPath() {
            if (!this._fsPath) {
                this._fsPath = uriToFsPath(this, false);
            }
            return this._fsPath;
        }
        toString(skipEncoding = false) {
            if (!skipEncoding) {
                if (!this._formatted) {
                    this._formatted = _asFormatted(this, false);
                }
                return this._formatted;
            }
            else {
                // we don't cache that
                return _asFormatted(this, true);
            }
        }
        toJSON() {
            const res = {
                $mid: 1
            };
            // cached state
            if (this._fsPath) {
                res.fsPath = this._fsPath;
                res._sep = _pathSepMarker;
            }
            if (this._formatted) {
                res.external = this._formatted;
            }
            // uri components
            if (this.path) {
                res.path = this.path;
            }
            if (this.scheme) {
                res.scheme = this.scheme;
            }
            if (this.authority) {
                res.authority = this.authority;
            }
            if (this.query) {
                res.query = this.query;
            }
            if (this.fragment) {
                res.fragment = this.fragment;
            }
            return res;
        }
    }
    // reserved characters: https://tools.ietf.org/html/rfc3986#section-2.2
    const encodeTable = {
        [58 /* Colon */]: '%3A',
        [47 /* Slash */]: '%2F',
        [63 /* QuestionMark */]: '%3F',
        [35 /* Hash */]: '%23',
        [91 /* OpenSquareBracket */]: '%5B',
        [93 /* CloseSquareBracket */]: '%5D',
        [64 /* AtSign */]: '%40',
        [33 /* ExclamationMark */]: '%21',
        [36 /* DollarSign */]: '%24',
        [38 /* Ampersand */]: '%26',
        [39 /* SingleQuote */]: '%27',
        [40 /* OpenParen */]: '%28',
        [41 /* CloseParen */]: '%29',
        [42 /* Asterisk */]: '%2A',
        [43 /* Plus */]: '%2B',
        [44 /* Comma */]: '%2C',
        [59 /* Semicolon */]: '%3B',
        [61 /* Equals */]: '%3D',
        [32 /* Space */]: '%20',
    };
    function encodeURIComponentFast(uriComponent, allowSlash) {
        let res = undefined;
        let nativeEncodePos = -1;
        for (let pos = 0; pos < uriComponent.length; pos++) {
            const code = uriComponent.charCodeAt(pos);
            // unreserved characters: https://tools.ietf.org/html/rfc3986#section-2.3
            if ((code >= 97 /* a */ && code <= 122 /* z */)
                || (code >= 65 /* A */ && code <= 90 /* Z */)
                || (code >= 48 /* Digit0 */ && code <= 57 /* Digit9 */)
                || code === 45 /* Dash */
                || code === 46 /* Period */
                || code === 95 /* Underline */
                || code === 126 /* Tilde */
                || (allowSlash && code === 47 /* Slash */)) {
                // check if we are delaying native encode
                if (nativeEncodePos !== -1) {
                    res += encodeURIComponent(uriComponent.substring(nativeEncodePos, pos));
                    nativeEncodePos = -1;
                }
                // check if we write into a new string (by default we try to return the param)
                if (res !== undefined) {
                    res += uriComponent.charAt(pos);
                }
            }
            else {
                // encoding needed, we need to allocate a new string
                if (res === undefined) {
                    res = uriComponent.substr(0, pos);
                }
                // check with default table first
                const escaped = encodeTable[code];
                if (escaped !== undefined) {
                    // check if we are delaying native encode
                    if (nativeEncodePos !== -1) {
                        res += encodeURIComponent(uriComponent.substring(nativeEncodePos, pos));
                        nativeEncodePos = -1;
                    }
                    // append escaped variant to result
                    res += escaped;
                }
                else if (nativeEncodePos === -1) {
                    // use native encode only when needed
                    nativeEncodePos = pos;
                }
            }
        }
        if (nativeEncodePos !== -1) {
            res += encodeURIComponent(uriComponent.substring(nativeEncodePos));
        }
        return res !== undefined ? res : uriComponent;
    }
    function encodeURIComponentMinimal(path) {
        let res = undefined;
        for (let pos = 0; pos < path.length; pos++) {
            const code = path.charCodeAt(pos);
            if (code === 35 /* Hash */ || code === 63 /* QuestionMark */) {
                if (res === undefined) {
                    res = path.substr(0, pos);
                }
                res += encodeTable[code];
            }
            else {
                if (res !== undefined) {
                    res += path[pos];
                }
            }
        }
        return res !== undefined ? res : path;
    }
    /**
     * Compute `fsPath` for the given uri
     */
    function uriToFsPath(uri, keepDriveLetterCasing) {
        let value;
        if (uri.authority && uri.path.length > 1 && uri.scheme === 'file') {
            // unc path: file://shares/c$/far/boo
            value = `//${uri.authority}${uri.path}`;
        }
        else if (uri.path.charCodeAt(0) === 47 /* Slash */
            && (uri.path.charCodeAt(1) >= 65 /* A */ && uri.path.charCodeAt(1) <= 90 /* Z */ || uri.path.charCodeAt(1) >= 97 /* a */ && uri.path.charCodeAt(1) <= 122 /* z */)
            && uri.path.charCodeAt(2) === 58 /* Colon */) {
            if (!keepDriveLetterCasing) {
                // windows drive letter: file:///c:/far/boo
                value = uri.path[1].toLowerCase() + uri.path.substr(2);
            }
            else {
                value = uri.path.substr(1);
            }
        }
        else {
            // other path
            value = uri.path;
        }
        if (platform_1.isWindows) {
            value = value.replace(/\//g, '\\');
        }
        return value;
    }
    exports.uriToFsPath = uriToFsPath;
    /**
     * Create the external version of a uri
     */
    function _asFormatted(uri, skipEncoding) {
        const encoder = !skipEncoding
            ? encodeURIComponentFast
            : encodeURIComponentMinimal;
        let res = '';
        let { scheme, authority, path, query, fragment } = uri;
        if (scheme) {
            res += scheme;
            res += ':';
        }
        if (authority || scheme === 'file') {
            res += _slash;
            res += _slash;
        }
        if (authority) {
            let idx = authority.indexOf('@');
            if (idx !== -1) {
                // <user>@<auth>
                const userinfo = authority.substr(0, idx);
                authority = authority.substr(idx + 1);
                idx = userinfo.indexOf(':');
                if (idx === -1) {
                    res += encoder(userinfo, false);
                }
                else {
                    // <user>:<pass>@<auth>
                    res += encoder(userinfo.substr(0, idx), false);
                    res += ':';
                    res += encoder(userinfo.substr(idx + 1), false);
                }
                res += '@';
            }
            authority = authority.toLowerCase();
            idx = authority.indexOf(':');
            if (idx === -1) {
                res += encoder(authority, false);
            }
            else {
                // <auth>:<port>
                res += encoder(authority.substr(0, idx), false);
                res += authority.substr(idx);
            }
        }
        if (path) {
            // lower-case windows drive letters in /C:/fff or C:/fff
            if (path.length >= 3 && path.charCodeAt(0) === 47 /* Slash */ && path.charCodeAt(2) === 58 /* Colon */) {
                const code = path.charCodeAt(1);
                if (code >= 65 /* A */ && code <= 90 /* Z */) {
                    path = `/${String.fromCharCode(code + 32)}:${path.substr(3)}`; // "/c:".length === 3
                }
            }
            else if (path.length >= 2 && path.charCodeAt(1) === 58 /* Colon */) {
                const code = path.charCodeAt(0);
                if (code >= 65 /* A */ && code <= 90 /* Z */) {
                    path = `${String.fromCharCode(code + 32)}:${path.substr(2)}`; // "/c:".length === 3
                }
            }
            // encode the rest of the path
            res += encoder(path, true);
        }
        if (query) {
            res += '?';
            res += encoder(query, false);
        }
        if (fragment) {
            res += '#';
            res += !skipEncoding ? encodeURIComponentFast(fragment, false) : fragment;
        }
        return res;
    }
    // --- decode
    function decodeURIComponentGraceful(str) {
        try {
            return decodeURIComponent(str);
        }
        catch (_a) {
            if (str.length > 3) {
                return str.substr(0, 3) + decodeURIComponentGraceful(str.substr(3));
            }
            else {
                return str;
            }
        }
    }
    const _rEncodedAsHex = /(%[0-9A-Za-z][0-9A-Za-z])+/g;
    function percentDecode(str) {
        if (!str.match(_rEncodedAsHex)) {
            return str;
        }
        return str.replace(_rEncodedAsHex, (match) => decodeURIComponentGraceful(match));
    }
});
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