nsOSHelperAppService.h

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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/. */

#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"

#include <windows.h>

#include <shlobj.h>

class nsMIMEInfoWin;

class nsIMIMEInfo;

class nsOSHelperAppService : public nsExternalHelperAppService {

 public:

  nsOSHelperAppService();

  virtual ~nsOSHelperAppService();

  // override nsIExternalProtocolService methods

  NS_IMETHOD OSProtocolHandlerExists(const char* aProtocolScheme,

                                     bool* aHandlerExists) override;

  nsresult LoadUriInternal(nsIURI* aURL);

  NS_IMETHOD GetApplicationDescription(const nsACString& aScheme,

                                       nsAString& _retval) override;

  NS_IMETHOD IsCurrentAppOSDefaultForProtocol(const nsACString& aScheme,

                                              bool* _retval) override;

  // method overrides for windows registry look up steps....

  NS_IMETHOD GetMIMEInfoFromOS(const nsACString& aMIMEType,

                               const nsACString& aFileExt, bool* aFound,

                               nsIMIMEInfo** aMIMEInfo) override;

  NS_IMETHOD UpdateDefaultAppInfo(nsIMIMEInfo* aMIMEInfo) override;

  NS_IMETHOD GetProtocolHandlerInfoFromOS(const nsACString& aScheme,

                                          bool* found,

                                          nsIHandlerInfo** _retval);

  virtual bool GetMIMETypeFromOSForExtension(const nsACString& aExtension,

                                             nsACString& aMIMEType) override;

  /** Get the string value of a registry value and store it in result.

   * @return true on success, false on failure

*/

  static bool GetValueString(HKEY hKey, const char16_t* pValueName,

                             nsAString& result);

 protected:

  nsresult GetDefaultAppInfo(const nsAString& aTypeName,

                             nsAString& aDefaultDescription,

                             nsIFile** aDefaultApplication);

  // Lookup a mime info by extension, using an optional type hint

  already_AddRefed<nsMIMEInfoWin> GetByExtension(

      const nsString& aFileExt, const char* aTypeHint = nullptr);

  nsresult InternalSetDefaultsOnMIME(nsMIMEInfoWin* aMIMEInfo);

  nsresult FindOSMimeInfoForType(const char* aMimeContentType, nsIURI* aURI,

                                 char** aFileExtension,

                                 nsIMIMEInfo** aMIMEInfo);

  static nsresult GetMIMEInfoFromRegistry(const nsString& fileType,

                                          nsIMIMEInfo* pInfo);

  /// Looks up the type for the extension aExt and compares it to aType

  static bool typeFromExtEquals(const char16_t* aExt, const char* aType);

 private:

  IApplicationAssociationRegistration* mAppAssoc;

};

#endif  // nsOSHelperAppService_h__