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/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIURI;
interface nsIFile;
interface nsIInterfaceRequestor;
interface nsIHandlerInfo;
/**
* The external protocol service is used for finding and launching
* web handlers (a la registerProtocolHandler in the HTML5 draft) or
* platform-specific applications for handling particular protocols.
*
* You can ask the external protocol service if it has an external
* handler for a given protocol scheme. And you can ask it to load
* the url using the default handler.
*/
[scriptable, uuid(70f93b7a-3ec6-4bcb-b093-92d9984c9f83)]
interface nsIExternalProtocolService : nsISupports
{
/**
* Check whether a handler for a specific protocol exists. Specifically,
* this looks to see whether there are any known possible application handlers
* in either the nsIHandlerService datastore or registered with the OS.
*
* @param aProtocolScheme The scheme from a url: http, ftp, mailto, etc.
*
* @return true if we have a handler and false otherwise.
*
* XXX shouldn't aProtocolScheme be an ACString like nsIURI::scheme?
*/
boolean externalProtocolHandlerExists(in string aProtocolScheme);
/**
* Check whether a handler for a specific protocol is "exposed" as a visible
* feature of the current application.
*
* An exposed protocol handler is one that can be used in all contexts. A
* non-exposed protocol handler is one that can only be used internally by the
* application. For example, a non-exposed protocol would not be loaded by the
* application in response to a link click or a X-remote openURL command.
* Instead, it would be deferred to the system's external protocol handler.
* XXX shouldn't aProtocolScheme be an ACString like nsIURI::scheme?
*/
boolean isExposedProtocol(in string aProtocolScheme);
/**
* Retrieve the handler for the given protocol. If neither the application
* nor the OS knows about a handler for the protocol, the object this method
* returns will represent a default handler for unknown content.
*
* @param aProtocolScheme the scheme from a URL: http, ftp, mailto, etc.
*
* Note: aProtocolScheme should not include a trailing colon, which is part
* of the URI syntax, not part of the scheme itself (i.e. pass "mailto" not
* "mailto:").
*
* @return the handler, if any; otherwise a default handler
*/
nsIHandlerInfo getProtocolHandlerInfo(in ACString aProtocolScheme);
/**
* Given a scheme, looks up the protocol info from the OS. This should be
* overridden by each OS's implementation.
*
* @param aScheme The protocol scheme we are looking for.
* @param aFound Was an OS default handler for this scheme found?
* @return An nsIHanderInfo for the protocol.
*/
nsIHandlerInfo getProtocolHandlerInfoFromOS(in ACString aProtocolScheme,
out boolean aFound);
/**
* Set some sane defaults for a protocol handler object.
*
* @param aHandlerInfo nsIHandlerInfo object, as returned by
* getProtocolHandlerInfoFromOS
* @param aOSHandlerExists was the object above created for an extant
* OS default handler? This is generally the
* value of the aFound out param from
* getProtocolHandlerInfoFromOS.
*/
void setProtocolHandlerDefaults(in nsIHandlerInfo aHandlerInfo,
in boolean aOSHandlerExists);
/**
* Used to load a url via an external protocol handler (if one exists)
*
* @param aURL The url to load
*
* @deprecated Use LoadURI instead (See Bug 389565 for removal)
*/
[deprecated] void loadUrl(in nsIURI aURL);
/**
* Used to load a URI via an external application. Might prompt the user for
* permission to load the external application.
*
* @param aURI
* The URI to load
*
* @param aWindowContext
* The window to parent the dialog against, and, if a web handler
* is chosen, it is loaded in this window as well. This parameter
* may be ultimately passed nsIURILoader.openURI in the case of a
* web handler, and aWindowContext is null or not present, web
* handlers will fail. We need to do better than that; bug 394483
* filed in order to track.
*
* @note Embedders that do not expose the http protocol should not currently
* use web-based protocol handlers, as handoff won't work correctly
* (bug 394479).
*/
void loadURI(in nsIURI aURI,
[optional] in nsIInterfaceRequestor aWindowContext);
/**
* Gets a human-readable description for the application responsible for
* handling a specific protocol.
*
* @param aScheme The scheme to look up. For example, "mms".
*
* @throw NS_ERROR_NOT_IMPLEMENTED
* If getting descriptions for protocol helpers is not supported
* @throw NS_ERROR_NOT_AVAILABLE
* If no protocol helper exists for this scheme, or if it is not
* possible to get a description for it.
*/
AString getApplicationDescription(in AUTF8String aScheme);
};
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