/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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 * License.
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 * The Original Code is the Mozilla browser.
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 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Scott MacGregor <mscott@netscape.com>
 *   Dan Mosedale <dmose@mozilla.org>
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#ifndef nsOSHelperAppService_h__
#define nsOSHelperAppService_h__

// The OS helper app service is a subclass of nsExternalHelperAppService and is implemented on each
// platform. It contains platform specific code for finding helper applications for a given mime type
// in addition to launching those applications.

#include "nsExternalHelperAppService.h"
#include "nsCExternalHandlerService.h"
#include "nsCOMPtr.h"

class nsHashtable;
class nsILineInputStream;

class nsOSHelperAppService : public nsExternalHelperAppService
{
public:
  nsOSHelperAppService();
  virtual ~nsOSHelperAppService();

  // method overrides for mime.types and mime.info look up steps
  already_AddRefed<nsIMIMEInfo> GetMIMEInfoFromOS(const nsACString& aMimeType,
                                                  const nsACString& aFileExt,
                                                  PRBool     *aFound);
  NS_IMETHOD GetProtocolHandlerInfoFromOS(const nsACString &aScheme,
                                          PRBool *found,
                                          nsIHandlerInfo **_retval);

  // override nsIExternalProtocolService methods
  nsresult OSProtocolHandlerExists(const char * aProtocolScheme, PRBool * aHandlerExists);
  NS_IMETHOD GetApplicationDescription(const nsACString& aScheme, nsAString& _retval);

  // GetFileTokenForPath must be implemented by each platform. 
  // platformAppPath --> a platform specific path to an application that we got out of the 
  //                     rdf data source. This can be a mac file spec, a unix path or a windows path depending on the platform
  // aFile --> an nsIFile representation of that platform application path.
  virtual nsresult GetFileTokenForPath(const PRUnichar * platformAppPath, nsIFile ** aFile);
  
protected:
  already_AddRefed<nsMIMEInfoBase> GetFromType(const nsCString& aMimeType);
  already_AddRefed<nsMIMEInfoBase> GetFromExtension(const nsCString& aFileExt);

  virtual void FixFilePermissions(nsILocalFile* aFile);
private:
  PRUint32 mPermissions;

  // Helper methods which have to access static members
  static nsresult UnescapeCommand(const nsAString& aEscapedCommand,
                                  const nsAString& aMajorType,
                                  const nsAString& aMinorType,
                                  nsHashtable& aTypeOptions,
                                  nsACString& aUnEscapedCommand);
  static nsresult GetFileLocation(const char* aPrefName,
                                  const char* aEnvVarName,
                                  PRUnichar** aFileLocation);
  static nsresult LookUpTypeAndDescription(const nsAString& aFileExtension,
                                           nsAString& aMajorType,
                                           nsAString& aMinorType,
                                           nsAString& aDescription,
                                           PRBool aUserData);
  static nsresult CreateInputStream(const nsAString& aFilename,
                                    nsIFileInputStream ** aFileInputStream,
                                    nsILineInputStream ** aLineInputStream,
                                    nsACString& aBuffer,
                                    PRBool * aNetscapeFormat,
                                    PRBool * aMore);

  static nsresult GetTypeAndDescriptionFromMimetypesFile(const nsAString& aFilename,
                                                         const nsAString& aFileExtension,
                                                         nsAString& aMajorType,
                                                         nsAString& aMinorType,
                                                         nsAString& aDescription);

  static nsresult LookUpExtensionsAndDescription(const nsAString& aMajorType,
                                                 const nsAString& aMinorType,
                                                 nsAString& aFileExtensions,
                                                 nsAString& aDescription);

  static nsresult GetExtensionsAndDescriptionFromMimetypesFile(const nsAString& aFilename,
                                                               const nsAString& aMajorType,
                                                               const nsAString& aMinorType,
                                                               nsAString& aFileExtensions,
                                                               nsAString& aDescription);

  static nsresult ParseNetscapeMIMETypesEntry(const nsAString& aEntry,
                                              nsAString::const_iterator& aMajorTypeStart,
                                              nsAString::const_iterator& aMajorTypeEnd,
                                              nsAString::const_iterator& aMinorTypeStart,
                                              nsAString::const_iterator& aMinorTypeEnd,
                                              nsAString& aExtensions,
                                              nsAString::const_iterator& aDescriptionStart,
                                              nsAString::const_iterator& aDescriptionEnd);

  static nsresult ParseNormalMIMETypesEntry(const nsAString& aEntry,
                                            nsAString::const_iterator& aMajorTypeStart,
                                            nsAString::const_iterator& aMajorTypeEnd,
                                            nsAString::const_iterator& aMinorTypeStart,
                                            nsAString::const_iterator& aMinorTypeEnd,
                                            nsAString& aExtensions,
                                            nsAString::const_iterator& aDescriptionStart,
                                            nsAString::const_iterator& aDescriptionEnd);

  static nsresult LookUpHandlerAndDescription(const nsAString& aMajorType,
                                              const nsAString& aMinorType,
                                              nsHashtable& aTypeOptions,
                                              nsAString& aHandler,
                                              nsAString& aDescription,
                                              nsAString& aMozillaFlags);
  
  static nsresult DoLookUpHandlerAndDescription(const nsAString& aMajorType,
                                                const nsAString& aMinorType,
                                                nsHashtable& aTypeOptions,
                                                nsAString& aHandler,
                                                nsAString& aDescription,
                                                nsAString& aMozillaFlags,
                                                PRBool aUserData);
  
  static nsresult GetHandlerAndDescriptionFromMailcapFile(const nsAString& aFilename,
                                                          const nsAString& aMajorType,
                                                          const nsAString& aMinorType,
                                                          nsHashtable& aTypeOptions,
                                                          nsAString& aHandler,
                                                          nsAString& aDescription,
                                                          nsAString& aMozillaFlags);

  nsresult GetHandlerAppFromPrefs(const char* aScheme, nsIFile** aApp);
};

#endif // nsOSHelperAppService_h__
