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nsOSHelperAppService.h
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00001 /* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
00002  * ***** BEGIN LICENSE BLOCK *****
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00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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00014  *
00015  * The Original Code is the Mozilla browser.
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00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications, Inc.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
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00022  * Contributor(s):
00023  *   Scott MacGregor <mscott@netscape.com>
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00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
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00038 
00039 #ifndef nsOSHelperAppService_h__
00040 #define nsOSHelperAppService_h__
00041 
00042 // The OS helper app service is a subclass of nsExternalHelperAppService and is implemented on each
00043 // platform. It contains platform specific code for finding helper applications for a given mime type
00044 // in addition to launching those applications.
00045 
00046 #include "nsExternalHelperAppService.h"
00047 #include "nsCExternalHandlerService.h"
00048 #include "nsCOMPtr.h"
00049 #include <windows.h>
00050 
00051 class nsMIMEInfoWin;
00052 
00053 class nsOSHelperAppService : public nsExternalHelperAppService
00054 {
00055 public:
00056   nsOSHelperAppService();
00057   virtual ~nsOSHelperAppService();
00058 
00059   // override nsIExternalProtocolService methods
00060   NS_IMETHOD ExternalProtocolHandlerExists(const char * aProtocolScheme, PRBool * aHandlerExists);
00061   nsresult LoadUriInternal(nsIURI * aURL);
00062   NS_IMETHOD GetApplicationDescription(const nsACString& aScheme, nsAString& _retval);
00063 
00064   // method overrides for windows registry look up steps....
00065   already_AddRefed<nsIMIMEInfo> GetMIMEInfoFromOS(const nsACString& aMIMEType, const nsACString& aFileExt, PRBool *aFound);
00066 
00070   static PRBool GetValueString(HKEY hKey, const PRUnichar* pValueName, nsAString& result);
00071 
00072 protected:
00073   nsresult GetDefaultAppInfo(const nsAString& aTypeName, nsAString& aDefaultDescription, nsIFile** aDefaultApplication);
00074   // Lookup a mime info by extension, using an optional type hint
00075   already_AddRefed<nsMIMEInfoWin> GetByExtension(const nsAFlatString& aFileExt, const char *aTypeHint = nsnull);
00076   nsresult FindOSMimeInfoForType(const char * aMimeContentType, nsIURI * aURI, char ** aFileExtension, nsIMIMEInfo ** aMIMEInfo);
00077 
00079   static PRBool sIsNT;
00080   static nsresult GetMIMEInfoFromRegistry(const nsAFlatString& fileType, nsIMIMEInfo *pInfo);
00082   static PRBool typeFromExtEquals(const PRUnichar* aExt, const char *aType);
00083 };
00084 
00085 #endif // nsOSHelperAppService_h__