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// Copyright (c) 2014 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.

package org.cef.callback;

/**
 * Class that manages custom scheme registrations.
 */
public interface CefSchemeRegistrar {

  /**
   * Register a custom scheme. This method should not be called for the built-in
   * HTTP, HTTPS, FILE, FTP, ABOUT and DATA schemes.
   *
   * If |isStandard| is true the scheme will be treated as a standard scheme.
   * Standard schemes are subject to URL canonicalization and parsing rules as
   * defined in the Common Internet Scheme Syntax RFC 1738 Section 3.1 available
   * at http://www.ietf.org/rfc/rfc1738.txt
   *
   * In particular, the syntax for standard scheme URLs must be of the form:
   *    *  [scheme]://[username]:[password]@[host]:[port]/[url-path]
   * 
   * Standard scheme URLs must have a host component that is a fully qualified
   * domain name as defined in Section 3.5 of RFC 1034 [13] and Section 2.1 of
   * RFC 1123. These URLs will be canonicalized to "scheme://host/path" in the
   * simplest case and "scheme://username:password@host:port/path" in the most
   * explicit case. For example, "scheme:host/path" and "scheme:///host/path"
   * will both be canonicalized to "scheme://host/path". The origin of a
   * standard scheme URL is the combination of scheme, host and port (i.e.,
   * "scheme://host:port" in the most explicit case).
   *
   * For non-standard scheme URLs only the "scheme:" component is parsed and
   * canonicalized. The remainder of the URL will be passed to the handler
   * as-is. For example, "scheme:///some%20text" will remain the same.
   * Non-standard scheme URLs cannot be used as a target for form submission.
   *
   * If |isLocal| is true the scheme will be treated as local (i.e., with the
   * same security rules as those applied to "file" URLs). Normal pages cannot
   * link to or access local URLs. Also, by default, local URLs can only perform
   * XMLHttpRequest calls to the same URL (origin + path) that originated the
   * request. To allow XMLHttpRequest calls from a local URL to other URLs with
   * the same origin set the CefSettings.file_access_from_file_urls_allowed
   * value to true. To allow XMLHttpRequest calls from a local URL to all
   * origins set the CefSettings.universal_access_from_file_urls_allowed value
   * to true.
   *
   * If |isDisplayIsolated| is true the scheme will be treated as display-
   * isolated. This means that pages cannot display these URLs unless they are
   * from the same scheme. For example, pages in another origin cannot create
   * iframes or hyperlinks to URLs with this scheme.
   *
   * This function may be called on any thread. It should only be called once
   * per unique |schemeName| value. If |schemeName| is already registered or
   * if an error occurs this method will return false.
   */
  public boolean addCustomScheme(String schemeName,
                                 boolean isStandard,
                                 boolean isLocal,
                                 boolean isDisplayIsolated);
}