File Association

Author: Vytautas (talk, contrib)

Author: intersol (talk, contrib)

Author: chefkoch (talk, contrib)

Description

Macro for registering and unregistering file extensions in NSIS scripts.

Can easily be used in installer AND uninstaller sections and functions. Won't overwrite any variables like $0 $1 ..... and $R0 $R1....... .

Usage

!include "registerExtension.nsh"
...
# later, inside a section:
${registerExtension} "c:\myplayer.exe" ".mkv" "MKV File"
 
${unregisterExtension} ".mkv" "MKV File"

FileAssociation.nsh

/*
_____________________________________________________________________________
 
                       File Association
_____________________________________________________________________________
 
 Based on code taken from http://nsis.sourceforge.net/File_Association 
 
 Usage in script:
 1. !include "FileAssociation.nsh"
 2. [Section|Function]
      ${FileAssociationFunction} "Param1" "Param2" "..." $var
    [SectionEnd|FunctionEnd]
 
 FileAssociationFunction=[RegisterExtension|UnRegisterExtension]
 
_____________________________________________________________________________
 
 ${RegisterExtension} "[executable]" "[extension]" "[description]"
 
"[executable]"     ; executable which opens the file format
                   ;
"[extension]"      ; extension, which represents the file format to open
                   ;
"[description]"    ; description for the extension. This will be display in Windows Explorer.
                   ;
 
 
 ${UnRegisterExtension} "[extension]" "[description]"
 
"[extension]"      ; extension, which represents the file format to open
                   ;
"[description]"    ; description for the extension. This will be display in Windows Explorer.
                   ;
 
_____________________________________________________________________________
 
                         Macros
_____________________________________________________________________________
 
 Change log window verbosity (default: 3=no script)
 
 Example:
 !include "FileAssociation.nsh"
 !insertmacro RegisterExtension
 ${FileAssociation_VERBOSE} 4   # all verbosity
 !insertmacro UnRegisterExtension
 ${FileAssociation_VERBOSE} 3   # no script
*/
 
 
!ifndef FileAssociation_INCLUDED
!define FileAssociation_INCLUDED
 
!include Util.nsh
 
!verbose push
!verbose 3
!ifndef _FileAssociation_VERBOSE
	!define _FileAssociation_VERBOSE 3
!endif
!verbose ${_FileAssociation_VERBOSE}
!define FileAssociation_VERBOSE `!insertmacro FileAssociation_VERBOSE`
!verbose pop
 
!macro FileAssociation_VERBOSE _VERBOSE
	!verbose push
	!verbose 3
	!undef _FileAssociation_VERBOSE
	!define _FileAssociation_VERBOSE ${_VERBOSE}
	!verbose pop
!macroend
 
 
 
!macro RegisterExtensionCall _EXECUTABLE _EXTENSION _DESCRIPTION
	!verbose push
	!verbose ${_FileAssociation_VERBOSE}
	Push `${_EXECUTABLE}`
	Push `${_EXTENSION}`
	Push `${_DESCRIPTION}`
	${CallArtificialFunction} RegisterExtension_
	!verbose pop
!macroend
 
!macro UnRegisterExtensionCall _EXTENSION _DESCRIPTION
	!verbose push
	!verbose ${_FileAssociation_VERBOSE}
	Push `${_EXTENSION}`
	Push `${_DESCRIPTION}`
	${CallArtificialFunction} UnRegisterExtension_
	!verbose pop
!macroend
 
 
 
!define RegisterExtension `!insertmacro RegisterExtensionCall`
!define un.RegisterExtension `!insertmacro RegisterExtensionCall`
 
!macro RegisterExtension
!macroend
 
!macro un.RegisterExtension
!macroend
 
!macro RegisterExtension_
  !verbose push
  !verbose ${_FileAssociation_VERBOSE}
 
  Exch $R2 ;desc
  Exch
  Exch $R1 ;ext
  Exch
  Exch 2
  Exch $R0 ;exe
  Exch 2
  Push $0
  Push $1
 
!define Index "Line${__LINE__}"
  ReadRegStr $1 HKCR $R1 ""
  StrCmp $1 "" "${Index}-NoBackup"
    StrCmp $1 "OptionsFile" "${Index}-NoBackup"
    WriteRegStr HKCR $R1 "backup_val" $1
 
"${Index}-NoBackup:"
  WriteRegStr HKCR $R1 "" $R0
  ReadRegStr $0 HKCR $R0 ""
  StrCmp $0 "" 0 "${Index}-Skip"
  WriteRegStr HKCR $R0 "" $R0
  WriteRegStr HKCR "$R0\shell" "" "open"
  WriteRegStr HKCR "$R0\DefaultIcon" "" "$R2,0"
 
"${Index}-Skip:"
  WriteRegStr HKCR "$R0\shell\open\command" "" '$R2 "%1"'
  WriteRegStr HKCR "$R0\shell\edit" "" "Edit $R0"
  WriteRegStr HKCR "$R0\shell\edit\command" "" '$R2 "%1"'
!undef Index
 
  Pop $1
  Pop $0
  Pop $R2
  Pop $R1
  Pop $R0
 
  !verbose pop
!macroend
 
 
 
!define UnRegisterExtension `!insertmacro UnRegisterExtensionCall`
!define un.UnRegisterExtension `!insertmacro UnRegisterExtensionCall`
 
!macro UnRegisterExtension
!macroend
 
!macro un.UnRegisterExtension
!macroend
 
!macro UnRegisterExtension_
  !verbose push
  !verbose ${_FileAssociation_VERBOSE}
 
  Exch $R1 ;desc
  Exch
  Exch $R0 ;ext
  Exch
  Push $0
  Push $1
 
!define Index "Line${__LINE__}"
  ReadRegStr $1 HKCR $R0 ""
  StrCmp $1 $R1 0 "${Index}-NoOwn" ; only do this if we own it
  ReadRegStr $1 HKCR $R0 "backup_val"
  StrCmp $1 "" 0 "${Index}-Restore" ; if backup="" then delete the whole key
  DeleteRegKey HKCR $R0
  Goto "${Index}-NoOwn"
 
"${Index}-Restore:"
  WriteRegStr HKCR $R0 "" $1
  DeleteRegValue HKCR $R0 "backup_val"
  DeleteRegKey HKCR $R1 ;Delete key with association name settings
 
"${Index}-NoOwn:"
!undef Index
 
  Pop $1
  Pop $0
  Pop $R1
  Pop $R0
 
  !verbose pop
!macroend
 
!endif # !FileAssociation_INCLUDED

Info

Any refereces to execute.exe should be replaced with the appropriate command to perform the specified action.

This page was based on information provided in "Examples\makensis.nsi" and this thread: http://forums.winamp.com/showthread.php?s=&threadid=140254

Vytautas