How to create windows installer

; Installer script for win32 Pidgin
; Original Author: Herman Bloggs
; Updated By: Daniel Atallah

; NOTE: this .NSI script is intended for NSIS 2.27
;

;--------------------------------
;Global Variables
Var name
Var GTK_FOLDER
Var ISSILENT
Var STARTUP_RUN_KEY
Var SPELLCHECK_SEL

;--------------------------------
;Configuration

;The name var is set in .onInit
Name $name

!ifdef WITH_GTK
OutFile "pidgin-${PIDGIN_VERSION}.exe"
!else
!ifdef DEBUG
OutFile "pidgin-${PIDGIN_VERSION}-debug.exe"
!else
OutFile "pidgin-${PIDGIN_VERSION}-no-gtk.exe"
!endif
!endif

SetCompressor /SOLID lzma
ShowInstDetails show
ShowUninstDetails show
SetDateSave on

; $name and $INSTDIR are set in .onInit function..

!include "MUI.nsh"
!include "Sections.nsh"
!include "WinVer.nsh"
!include "LogicLib.nsh"

!include "FileFunc.nsh"
!insertmacro GetParameters
!insertmacro GetOptions
!insertmacro GetParent

!include "WordFunc.nsh"
!insertmacro VersionCompare
!insertmacro WordFind
!insertmacro un.WordFind

;--------------------------------
;Defines

!define PIDGIN_NSIS_INCLUDE_PATH		"."
!define PIDGIN_INSTALLER_DEPS			"........win32-devpidgin-inst-deps"

; Remove these and the stuff that uses them at some point
!define OLD_GAIM_REG_KEY			"SOFTWAREgaim"
!define OLD_GAIM_UNINSTALL_KEY			"SOFTWAREMicrosoftWindowsCurrentVersionUninstallGaim"
!define OLD_GAIM_UNINST_EXE			"gaim-uninst.exe"

!define PIDGIN_REG_KEY				"SOFTWAREpidgin"
!define PIDGIN_UNINSTALL_KEY			"SOFTWAREMicrosoftWindowsCurrentVersionUninstallPidgin"

!define HKLM_APP_PATHS_KEY			"SOFTWAREMicrosoftWindowsCurrentVersionApp Pathspidgin.exe"
!define STARTUP_RUN_KEY				"SOFTWAREMicrosoftWindowsCurrentVersionRun"
!define PIDGIN_UNINST_EXE			"pidgin-uninst.exe"

!define GTK_MIN_VERSION				"2.6.10"
!define GTK_REG_KEY				"SOFTWAREGTK2.0"
!define PERL_REG_KEY				"SOFTWAREPerl"
!define PERL_DLL				"perl510.dll"
!define GTK_DEFAULT_INSTALL_PATH		"$COMMONFILESGTK2.0"
!define GTK_RUNTIME_INSTALLER			"........gtk_installergtk-runtime*.exe"

!define ASPELL_REG_KEY				"SOFTWAREAspell"
!define DOWNLOADER_URL				"http://pidgin.im/win32/download_redir.php"

;--------------------------------
;Version resource
VIProductVersion "${PIDGIN_PRODUCT_VERSION}"
VIAddVersionKey "ProductName" "Pidgin"
VIAddVersionKey "FileVersion" "${PIDGIN_VERSION}"
VIAddVersionKey "ProductVersion" "${PIDGIN_VERSION}"
VIAddVersionKey "LegalCopyright" ""
!ifdef WITH_GTK
VIAddVersionKey "FileDescription" "Pidgin Installer (w/ GTK+ Installer)"
!else
!ifdef DEBUG
VIAddVersionKey "FileDescription" "Pidgin Installer (Debug Version)"
!else
VIAddVersionKey "FileDescription" "Pidgin Installer (w/o GTK+ Installer)"
!endif
!endif

;--------------------------------
;Reserve files used in .onInit
;for faster start-up
ReserveFile "${NSISDIR}PluginsSystem.dll"
!insertmacro MUI_RESERVEFILE_INSTALLOPTIONS
!insertmacro MUI_RESERVEFILE_LANGDLL

;--------------------------------
;Modern UI Configuration

  !define MUI_ICON				".pixmapspidgin-install.ico"
  !define MUI_UNICON				".pixmapspidgin-install.ico"
  !define MUI_WELCOMEFINISHPAGE_BITMAP		".pixmapspidgin-intro.bmp"
  !define MUI_HEADERIMAGE
  !define MUI_HEADERIMAGE_BITMAP		".pixmapspidgin-header.bmp"

  ; Alter License section
  !define MUI_LICENSEPAGE_BUTTON		$(PIDGIN_LICENSE_BUTTON)
  !define MUI_LICENSEPAGE_TEXT_BOTTOM		$(PIDGIN_LICENSE_BOTTOM_TEXT)

  !define MUI_LANGDLL_REGISTRY_ROOT "HKCU"
  !define MUI_LANGDLL_REGISTRY_KEY ${PIDGIN_REG_KEY}
  !define MUI_LANGDLL_REGISTRY_VALUENAME "Installer Language"

  !define MUI_COMPONENTSPAGE_SMALLDESC
  !define MUI_ABORTWARNING

  ;Finish Page config
  !define MUI_FINISHPAGE_NOAUTOCLOSE
  !define MUI_FINISHPAGE_RUN			"$INSTDIRpidgin.exe"
  !define MUI_FINISHPAGE_RUN_NOTCHECKED
  !define MUI_FINISHPAGE_LINK			$(PIDGIN_FINISH_VISIT_WEB_SITE)
  !define MUI_FINISHPAGE_LINK_LOCATION		"http://pidgin.im"

;--------------------------------
;Pages

  !define MUI_PAGE_CUSTOMFUNCTION_PRE		preWelcomePage
  !insertmacro MUI_PAGE_WELCOME
  !insertmacro MUI_PAGE_LICENSE			"../../../COPYING"
  !insertmacro MUI_PAGE_COMPONENTS

!ifdef WITH_GTK
  ; GTK+ install dir page
  !define MUI_PAGE_CUSTOMFUNCTION_PRE		preGtkDirPage
  !define MUI_PAGE_CUSTOMFUNCTION_LEAVE		postGtkDirPage
  !define MUI_DIRECTORYPAGE_VARIABLE		$GTK_FOLDER
  !insertmacro MUI_PAGE_DIRECTORY
!endif

  ; Pidgin install dir page
  !insertmacro MUI_PAGE_DIRECTORY

  !insertmacro MUI_PAGE_INSTFILES
  !insertmacro MUI_PAGE_FINISH

  !insertmacro MUI_UNPAGE_WELCOME
  !insertmacro MUI_UNPAGE_CONFIRM
  !insertmacro MUI_UNPAGE_INSTFILES
  !insertmacro MUI_UNPAGE_FINISH

;--------------------------------
;Languages

  ;; English goes first because its the default. The rest are
  ;; in alphabetical order (at least the strings actually displayed
  ;; will be).

  !insertmacro MUI_LANGUAGE "English"

  !insertmacro MUI_LANGUAGE "Afrikaans"
  !insertmacro MUI_LANGUAGE "Albanian"
  !insertmacro MUI_LANGUAGE "Arabic"
  !insertmacro MUI_LANGUAGE "Basque"
  !insertmacro MUI_LANGUAGE "Bulgarian"
  !insertmacro MUI_LANGUAGE "Catalan"
  !insertmacro MUI_LANGUAGE "Czech"
  !insertmacro MUI_LANGUAGE "Danish"
  !insertmacro MUI_LANGUAGE "SimpChinese"
  !insertmacro MUI_LANGUAGE "TradChinese"
  !insertmacro MUI_LANGUAGE "German"
  !insertmacro MUI_LANGUAGE "Spanish"
  !insertmacro MUI_LANGUAGE "Farsi"
  !insertmacro MUI_LANGUAGE "Finnish"
  !insertmacro MUI_LANGUAGE "French"
  !insertmacro MUI_LANGUAGE "Hebrew"
  !insertmacro MUI_LANGUAGE "Italian"
  !insertmacro MUI_LANGUAGE "Japanese"
  !insertmacro MUI_LANGUAGE "Korean"
  !insertmacro MUI_LANGUAGE "Kurdish"
  !insertmacro MUI_LANGUAGE "Lithuanian"
  !insertmacro MUI_LANGUAGE "Hungarian"
  !insertmacro MUI_LANGUAGE "Dutch"
  !insertmacro MUI_LANGUAGE "Norwegian"
  !insertmacro MUI_LANGUAGE "Polish"
  !insertmacro MUI_LANGUAGE "PortugueseBR"
  !insertmacro MUI_LANGUAGE "Portuguese"
  !insertmacro MUI_LANGUAGE "Romanian"
  !insertmacro MUI_LANGUAGE "Russian"
  !insertmacro MUI_LANGUAGE "Serbian"
  !insertmacro MUI_LANGUAGE "Slovak"
  !insertmacro MUI_LANGUAGE "Slovenian"
  !insertmacro MUI_LANGUAGE "Swedish"

;--------------------------------
;Translations

  !define PIDGIN_DEFAULT_LANGFILE "${PIDGIN_NSIS_INCLUDE_PATH}translationsenglish.nsh"

  !include "${PIDGIN_NSIS_INCLUDE_PATH}langmacros.nsh"

  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "AFRIKAANS"	"${PIDGIN_NSIS_INCLUDE_PATH}translationsafrikaans.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "ALBANIAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsalbanian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "ARABIC"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsarabic.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "BASQUE"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsbasque.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "BULGARIAN"	"${PIDGIN_NSIS_INCLUDE_PATH}translationsbulgarian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "CATALAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationscatalan.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "CZECH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsczech.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "DANISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsdanish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "DUTCH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsdutch.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "ENGLISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsenglish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "FARSI"		"${PIDGIN_NSIS_INCLUDE_PATH}translationspersian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "FINNISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsfinnish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "FRENCH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsfrench.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "GERMAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsgerman.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "HEBREW"		"${PIDGIN_NSIS_INCLUDE_PATH}translationshebrew.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "HUNGARIAN"	"${PIDGIN_NSIS_INCLUDE_PATH}translationshungarian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "ITALIAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsitalian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "JAPANESE"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsjapanese.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "KOREAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationskorean.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "KURDISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationskurdish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "LITHUANIAN"	"${PIDGIN_NSIS_INCLUDE_PATH}translationslithuanian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "NORWEGIAN"	"${PIDGIN_NSIS_INCLUDE_PATH}translationsnorwegian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "POLISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationspolish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "PORTUGUESE"	"${PIDGIN_NSIS_INCLUDE_PATH}translationsportuguese.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "PORTUGUESEBR"	"${PIDGIN_NSIS_INCLUDE_PATH}translationsportuguese-br.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "ROMANIAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsromanian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "RUSSIAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsrussian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "SERBIAN"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsserbian-latin.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "SIMPCHINESE"	"${PIDGIN_NSIS_INCLUDE_PATH}translationssimp-chinese.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "SLOVAK"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsslovak.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "SLOVENIAN"	"${PIDGIN_NSIS_INCLUDE_PATH}translationsslovenian.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "SPANISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsspanish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "SWEDISH"		"${PIDGIN_NSIS_INCLUDE_PATH}translationsswedish.nsh"
  !insertmacro PIDGIN_MACRO_INCLUDE_LANGFILE "TRADCHINESE"	"${PIDGIN_NSIS_INCLUDE_PATH}translationstrad-chinese.nsh"

;--------------------------------
;Reserve Files
  ; Only need this if using bzip2 compression

  !insertmacro MUI_RESERVEFILE_INSTALLOPTIONS
  !insertmacro MUI_RESERVEFILE_LANGDLL
  ReserveFile "${NSISDIR}PluginsUserInfo.dll"


;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Start Install Sections ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;--------------------------------
;Uninstall any old version of Pidgin (or Gaim)

Section -SecUninstallOldPidgin
  ; Check install rights..
  Call CheckUserInstallRights
  Pop $R0

  ;First try to uninstall Pidgin
  StrCpy $R4 ${PIDGIN_REG_KEY}
  StrCpy $R5 ${PIDGIN_UNINSTALL_KEY}
  StrCpy $R6 ${PIDGIN_UNINST_EXE}
  StrCpy $R7 "Pidgin"

  start_comparison:
  ;If pidgin is currently set to run on startup,
  ;  save the section of the Registry where the setting is before uninstalling,
  ;  so we can put it back after installing the new version
  ClearErrors
  ReadRegStr $STARTUP_RUN_KEY HKCU "${STARTUP_RUN_KEY}" $R7
  IfErrors +3
  StrCpy $STARTUP_RUN_KEY "HKCU"
  Goto +5
  ClearErrors
  ReadRegStr $STARTUP_RUN_KEY HKLM "${STARTUP_RUN_KEY}" $R7
  IfErrors +2
  StrCpy $STARTUP_RUN_KEY "HKLM"

  StrCmp $R0 "HKLM" compare_hklm
  StrCmp $R0 "HKCU" compare_hkcu done

  compare_hkcu:
      ReadRegStr $R1 HKCU $R4 ""
      ReadRegStr $R2 HKCU $R4 "Version"
      ReadRegStr $R3 HKCU "$R5" "UninstallString"
      Goto try_uninstall

  compare_hklm:
      ReadRegStr $R1 HKLM $R4 ""
      ReadRegStr $R2 HKLM $R4 "Version"
      ReadRegStr $R3 HKLM "$R5" "UninstallString"

  ; If a previous version exists, remove it
  try_uninstall:
    StrCmp $R1 "" no_version_found
      ; Version key started with 0.60a3. Prior versions can't be
      ; automatically uninstalled.
      StrCmp $R2 "" uninstall_problem
        ; Check if we have uninstall string..
        IfFileExists $R3 0 uninstall_problem
          ; Have uninstall string, go ahead and uninstall.
          SetOverwrite on
          ; Need to copy uninstaller outside of the install dir
          ClearErrors
          CopyFiles /SILENT $R3 "$TEMP$R6"
          SetOverwrite off
          IfErrors uninstall_problem
            ; Ready to uninstall..
            ClearErrors
            ExecWait '"$TEMP$R6" /S _?=$R1'
            IfErrors exec_error
              Delete "$TEMP$R6"
            Goto done

            exec_error:
              Delete "$TEMP$R6"
              Goto uninstall_problem

        no_version_found:
          ;We've already tried to fallback to an old gaim instance
          StrCmp $R7 "Gaim" done
          ; If we couldn't uninstall Pidgin, try to uninstall Gaim
          StrCpy $STARTUP_RUN_KEY "NONE"
          StrCpy $R4 ${OLD_GAIM_REG_KEY}
          StrCpy $R5 ${OLD_GAIM_UNINSTALL_KEY}
          StrCpy $R6 ${OLD_GAIM_UNINST_EXE}
          StrCpy $R7 "Gaim"
          Goto start_comparison

        uninstall_problem:
          ; We can't uninstall.  Either the user must manually uninstall or we ignore and reinstall over it.
          MessageBox MB_OKCANCEL $(PIDGIN_PROMPT_CONTINUE_WITHOUT_UNINSTALL) /SD IDOK IDOK done
          Quit
  done:
SectionEnd


;--------------------------------
;GTK+ Runtime Install Section

!ifdef WITH_GTK
Section $(GTK_SECTION_TITLE) SecGtk

  Call CheckUserInstallRights
  Pop $R1

  SetOutPath $TEMP
  SetOverwrite on
  File /oname=gtk-runtime.exe ${GTK_RUNTIME_INSTALLER}
  SetOverwrite off

  Call DoWeNeedGtk
  Pop $R0
  Pop $R6

  StrCmp $R0 "0" have_gtk
  StrCmp $R0 "1" upgrade_gtk
  StrCmp $R0 "2" upgrade_gtk
  ;StrCmp $R0 "3" no_gtk no_gtk

  ;no_gtk:
    StrCmp $R1 "NONE" gtk_no_install_rights
    ClearErrors
    ExecWait '"$TEMPgtk-runtime.exe" /L=$LANGUAGE $ISSILENT /D=$GTK_FOLDER'
    IfErrors gtk_install_error done

  upgrade_gtk:
    StrCpy $GTK_FOLDER $R6
    StrCmp $R0 "2" +2 ; Upgrade isn't optional
    MessageBox MB_YESNO $(GTK_UPGRADE_PROMPT) /SD IDYES IDNO done
    ClearErrors
    ExecWait '"$TEMPgtk-runtime.exe" /L=$LANGUAGE $ISSILENT /D=$GTK_FOLDER'
    IfErrors gtk_install_error done

    gtk_install_error:
      Delete "$TEMPgtk-runtime.exe"
      MessageBox MB_OK $(GTK_INSTALL_ERROR) /SD IDOK
      Quit

  have_gtk:
    StrCpy $GTK_FOLDER $R6
    StrCmp $R1 "NONE" done ; If we have no rights, we can't re-install
    ; Even if we have a sufficient version of GTK+, we give user choice to re-install.
    ClearErrors
    ExecWait '"$TEMPgtk-runtime.exe" /L=$LANGUAGE $ISSILENT'
    IfErrors gtk_install_error
    Goto done

  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  ; end got_install rights

  gtk_no_install_rights:
    ; Install GTK+ to Pidgin install dir
    StrCpy $GTK_FOLDER $INSTDIR
    ClearErrors
    ExecWait '"$TEMPgtk-runtime.exe" /L=$LANGUAGE $ISSILENT /D=$GTK_FOLDER'
    IfErrors gtk_install_error
      SetOverwrite on
      ClearErrors
      CopyFiles /FILESONLY "$GTK_FOLDERbin*.dll" $GTK_FOLDER
      SetOverwrite off
      IfErrors gtk_install_error
        Delete "$GTK_FOLDERbin*.dll"
        Goto done
  ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  ; end gtk_no_install_rights

  done:
    Delete "$TEMPgtk-runtime.exe"
SectionEnd ; end of GTK+ section
!endif

;--------------------------------
;Pidgin Install Section

Section $(PIDGIN_SECTION_TITLE) SecPidgin
  SectionIn 1 RO

  ; Check install rights..
  Call CheckUserInstallRights
  Pop $R0

  ; Get GTK+ lib dir if we have it..

  StrCmp $R0 "NONE" pidgin_none
  StrCmp $R0 "HKLM" pidgin_hklm pidgin_hkcu

  pidgin_hklm:
    ReadRegStr $R1 HKLM ${GTK_REG_KEY} "Path"
    WriteRegStr HKLM "${HKLM_APP_PATHS_KEY}" "" "$INSTDIRpidgin.exe"
    WriteRegStr HKLM "${HKLM_APP_PATHS_KEY}" "Path" "$R1bin"
    WriteRegStr HKLM ${PIDGIN_REG_KEY} "" "$INSTDIR"
    WriteRegStr HKLM ${PIDGIN_REG_KEY} "Version" "${PIDGIN_VERSION}"
    WriteRegStr HKLM "${PIDGIN_UNINSTALL_KEY}" "DisplayName" "Pidgin"
    WriteRegStr HKLM "${PIDGIN_UNINSTALL_KEY}" "DisplayVersion" "${PIDGIN_VERSION}"
    WriteRegStr HKLM "${PIDGIN_UNINSTALL_KEY}" "HelpLink" "http://developer.pidgin.im/wiki/Using Pidgin"
    WriteRegDWORD HKLM "${PIDGIN_UNINSTALL_KEY}" "NoModify" 1
    WriteRegDWORD HKLM "${PIDGIN_UNINSTALL_KEY}" "NoRepair" 1
    WriteRegStr HKLM "${PIDGIN_UNINSTALL_KEY}" "UninstallString" "$INSTDIR${PIDGIN_UNINST_EXE}"
    ; Sets scope of the desktop and Start Menu entries for all users.
    SetShellVarContext "all"
    Goto pidgin_install_files

  pidgin_hkcu:
    ReadRegStr $R1 HKCU ${GTK_REG_KEY} "Path"
    StrCmp $R1 "" 0 +2
      ReadRegStr $R1 HKLM ${GTK_REG_KEY} "Path"

    WriteRegStr HKCU ${PIDGIN_REG_KEY} "" "$INSTDIR"
    WriteRegStr HKCU ${PIDGIN_REG_KEY} "Version" "${PIDGIN_VERSION}"
    WriteRegStr HKCU "${PIDGIN_UNINSTALL_KEY}" "DisplayName" "Pidgin"
    WriteRegStr HKCU "${PIDGIN_UNINSTALL_KEY}" "DisplayVersion" "${PIDGIN_VERSION}"
    WriteRegStr HKCU "${PIDGIN_UNINSTALL_KEY}" "HelpLink" "http://developer.pidgin.im/wiki/Using Pidgin"
    WriteRegDWORD HKCU "${PIDGIN_UNINSTALL_KEY}" "NoModify" 1
    WriteRegDWORD HKCU "${PIDGIN_UNINSTALL_KEY}" "NoRepair" 1
    WriteRegStr HKCU "${PIDGIN_UNINSTALL_KEY}" "UninstallString" "$INSTDIR${PIDGIN_UNINST_EXE}"
    Goto pidgin_install_files

  pidgin_none:
    ReadRegStr $R1 HKLM ${GTK_REG_KEY} "Path"

  pidgin_install_files:
    SetOutPath "$INSTDIR"
    ; Pidgin files
    SetOverwrite on

    ;Delete old liboscar and libjabber since they tend to be problematic
    Delete "$INSTDIRpluginsliboscar.dll"
    Delete "$INSTDIRpluginslibjabber.dll"

    File /r ......${PIDGIN_INSTALL_DIR}*.*
    !ifdef DEBUG
    File "${PIDGIN_INSTALLER_DEPS}exchndl.dll"
    !endif

    ; Install shfolder.dll if need be..
    SearchPath $R4 "shfolder.dll"
    StrCmp $R4 "" 0 got_shfolder
      SetOutPath "$SYSDIR"
      File "${PIDGIN_INSTALLER_DEPS}shfolder.dll"
      SetOutPath "$INSTDIR"
    got_shfolder:

    ; Check if Perl is installed, if so add it to the AppPaths
    ReadRegStr $R2 HKLM ${PERL_REG_KEY} ""
    StrCmp $R2 "" 0 perl_exists
      ReadRegStr $R2 HKCU ${PERL_REG_KEY} ""
      StrCmp $R2 "" perl_done perl_exists

      perl_exists:
        IfFileExists "$R2bin${PERL_DLL}" 0 perl_done
        StrCmp $R0 "HKLM" 0 perl_done
          ReadRegStr $R3 HKLM "${HKLM_APP_PATHS_KEY}" "Path"
          WriteRegStr HKLM "${HKLM_APP_PATHS_KEY}" "Path" "$R3;$R2bin"

    perl_done:

    ; If this is under NT4, delete the SILC support stuff
    ; there is a bug that will prevent any account from connecting
    ; See https://lists.silcnet.org/pipermail/silc-devel/2005-January/001588.html
    ; Also, remove the GSSAPI SASL plugin and associated files as they aren't
    ; compatible with NT4.
    ${If} ${IsNT}
    ${AndIf} ${IsWinNT4}
      ;SILC
      Delete "$INSTDIRpluginslibsilc.dll"
      Delete "$INSTDIRlibsilcclient-1-1-2.dll"
      Delete "$INSTDIRlibsilc-1-1-2.dll"
      ;GSSAPI
      Delete "$INSTDIRsasl2saslGSSAPI.dll"
    ${EndIf}

    SetOutPath "$INSTDIR"

    ; If we don't have install rights we're done
    StrCmp $R0 "NONE" done
    SetOverwrite off

    ; write out uninstaller
    SetOverwrite on
    WriteUninstaller "$INSTDIR${PIDGIN_UNINST_EXE}"
    SetOverwrite off

    ; If we previously had pidgin set up to run on startup, make it do so again
    StrCmp $STARTUP_RUN_KEY "HKCU" +1 +2
    WriteRegStr HKCU "${STARTUP_RUN_KEY}" "Pidgin" "$INSTDIRpidgin.exe"
    StrCmp $STARTUP_RUN_KEY "HKLM" +1 +2
    WriteRegStr HKLM "${STARTUP_RUN_KEY}" "Pidgin" "$INSTDIRpidgin.exe"

  done:
SectionEnd ; end of default Pidgin section

;--------------------------------
;Shortcuts

SectionGroup /e $(PIDGIN_SHORTCUTS_SECTION_TITLE) SecShortcuts
  Section /o $(PIDGIN_DESKTOP_SHORTCUT_SECTION_TITLE) SecDesktopShortcut
    SetOverwrite on
    CreateShortCut "$DESKTOPPidgin.lnk" "$INSTDIRpidgin.exe"
    SetOverwrite off
  SectionEnd
  Section $(PIDGIN_STARTMENU_SHORTCUT_SECTION_TITLE) SecStartMenuShortcut
    SetOverwrite on
    CreateShortCut "$SMPROGRAMSPidgin.lnk" "$INSTDIRpidgin.exe"
    SetOverwrite off
  SectionEnd
SectionGroupEnd

;--------------------------------
;URI Handling

!macro URI_SECTION proto
  Section /o "${proto}:" SecURI_${proto}
    Push "${proto}"
    Call RegisterURIHandler
  SectionEnd
!macroend
SectionGroup /e $(URI_HANDLERS_SECTION_TITLE) SecURIHandlers
  !insertmacro URI_SECTION "aim"
  !insertmacro URI_SECTION "msnim"
  !insertmacro URI_SECTION "myim"
  !insertmacro URI_SECTION "ymsgr"
SectionGroupEnd

;--------------------------------
;Spell Checking

SectionGroup /e $(PIDGIN_SPELLCHECK_SECTION_TITLE) SecSpellCheck
  Section /o $(PIDGIN_SPELLCHECK_BRETON) SecSpellCheckBreton
    Push ${SecSpellCheckBreton}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_CATALAN) SecSpellCheckCatalan
    Push ${SecSpellCheckCatalan}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_CZECH) SecSpellCheckCzech
    Push ${SecSpellCheckCzech}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_WELSH) SecSpellCheckWelsh
    Push ${SecSpellCheckWelsh}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_DANISH) SecSpellCheckDanish
    Push ${SecSpellCheckDanish}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_GERMAN) SecSpellCheckGerman
    Push ${SecSpellCheckGerman}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_GREEK) SecSpellCheckGreek
    Push ${SecSpellCheckGreek}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_ENGLISH) SecSpellCheckEnglish
    Push ${SecSpellCheckEnglish}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_ESPERANTO) SecSpellCheckEsperanto
    Push ${SecSpellCheckEsperanto}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_SPANISH) SecSpellCheckSpanish
    Push ${SecSpellCheckSpanish}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_FAROESE) SecSpellCheckFaroese
    Push ${SecSpellCheckFaroese}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_FRENCH) SecSpellCheckFrench
    Push ${SecSpellCheckFrench}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_ITALIAN) SecSpellCheckItalian
    Push ${SecSpellCheckItalian}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_DUTCH) SecSpellCheckDutch
    Push ${SecSpellCheckDutch}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_NORWEGIAN) SecSpellCheckNorwegian
    Push ${SecSpellCheckNorwegian}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_POLISH) SecSpellCheckPolish
    Push ${SecSpellCheckPolish}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_PORTUGUESE) SecSpellCheckPortuguese
    Push ${SecSpellCheckPortuguese}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_ROMANIAN) SecSpellCheckRomanian
    Push ${SecSpellCheckRomanian}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_RUSSIAN) SecSpellCheckRussian
    Push ${SecSpellCheckRussian}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_SLOVAK) SecSpellCheckSlovak
    Push ${SecSpellCheckSlovak}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_SWEDISH) SecSpellCheckSwedish
    Push ${SecSpellCheckSwedish}
    Call InstallAspellAndDict
  SectionEnd
  Section /o $(PIDGIN_SPELLCHECK_UKRAINIAN) SecSpellCheckUkrainian
    Push ${SecSpellCheckUkrainian}
    Call InstallAspellAndDict
  SectionEnd
SectionGroupEnd

;--------------------------------
;Uninstaller Section


Section Uninstall
  Call un.CheckUserInstallRights
  Pop $R0
  StrCmp $R0 "NONE" no_rights
  StrCmp $R0 "HKCU" try_hkcu try_hklm

  try_hkcu:
    ReadRegStr $R0 HKCU ${PIDGIN_REG_KEY} ""
    StrCmp $R0 $INSTDIR 0 cant_uninstall
      ; HKCU install path matches our INSTDIR so uninstall
      DeleteRegKey HKCU ${PIDGIN_REG_KEY}
      DeleteRegKey HKCU "${PIDGIN_UNINSTALL_KEY}"
      Goto cont_uninstall

  try_hklm:
    ReadRegStr $R0 HKLM ${PIDGIN_REG_KEY} ""
    StrCmp $R0 $INSTDIR 0 try_hkcu
      ; HKLM install path matches our INSTDIR so uninstall
      DeleteRegKey HKLM ${PIDGIN_REG_KEY}
      DeleteRegKey HKLM "${PIDGIN_UNINSTALL_KEY}"
      DeleteRegKey HKLM "${HKLM_APP_PATHS_KEY}"
      ; Sets start menu and desktop scope to all users..
      SetShellVarContext "all"

  cont_uninstall:
    ; The WinPrefs plugin may have left this behind..
    DeleteRegValue HKCU "${STARTUP_RUN_KEY}" "Pidgin"
    DeleteRegValue HKLM "${STARTUP_RUN_KEY}" "Pidgin"
    ; Remove Language preference info
    DeleteRegValue HKCU "${PIDGIN_REG_KEY}" "Installer Language"

    ; Remove any URI handlers
    ; I can't think of an easy way to maintain a list in a single place
    Push "aim"
    Call un.UnregisterURIHandler
    Push "msnim"
    Call un.UnregisterURIHandler
    Push "myim"
    Call un.UnregisterURIHandler
    Push "ymsgr"
    Call un.UnregisterURIHandler

    Delete "$INSTDIRca-certsCAcert_Class3.pem"
    Delete "$INSTDIRca-certsCAcert_Root.pem"
    Delete "$INSTDIRca-certsEquifax_Secure_CA.pem"
    Delete "$INSTDIRca-certsGTE_CyberTrust_Global_Root.pem"
    Delete "$INSTDIRca-certsMicrosoft_Internet_Authority.pem"
    Delete "$INSTDIRca-certsMicrosoft_Secure_Server_Authority.pem"
    Delete "$INSTDIRca-certsStartCom_Free_SSL_CA.pem"
    Delete "$INSTDIRca-certsVerisign_Class3_Primary_CA.pem"
    Delete "$INSTDIRca-certsVeriSign_Class_3_Public_Primary_Certification_Authority_-_G5.pem"
    Delete "$INSTDIRca-certsVeriSign_International_Server_Class_3_CA.pem"
    Delete "$INSTDIRca-certsVerisign_RSA_Secure_Server_CA.pem"
    RMDir "$INSTDIRca-certs"
    RMDir /r "$INSTDIRlocale"
    RMDir /r "$INSTDIRpixmaps"
    RMDir /r "$INSTDIRperlmod"
    Delete "$INSTDIRpluginsautoaccept.dll"
    Delete "$INSTDIRpluginsbuddynote.dll"
    Delete "$INSTDIRpluginsconvcolors.dll"
    Delete "$INSTDIRpluginsextplacement.dll"
    Delete "$INSTDIRpluginsgtkbuddynote.dll"
    Delete "$INSTDIRpluginshistory.dll"
    Delete "$INSTDIRpluginsiconaway.dll"
    Delete "$INSTDIRpluginsidle.dll"
    Delete "$INSTDIRpluginsjoinpart.dll"
    Delete "$INSTDIRpluginslibaim.dll"
    Delete "$INSTDIRpluginslibbonjour.dll"
    Delete "$INSTDIRpluginslibgg.dll"
    Delete "$INSTDIRpluginslibicq.dll"
    Delete "$INSTDIRpluginslibirc.dll"
    Delete "$INSTDIRpluginslibmsn.dll"
    Delete "$INSTDIRpluginslibmyspace.dll"
    Delete "$INSTDIRpluginslibnapster.dll"
    Delete "$INSTDIRpluginslibnovell.dll"
    Delete "$INSTDIRpluginslibqq.dll"
    Delete "$INSTDIRpluginslibsametime.dll"
    Delete "$INSTDIRpluginslibsilc.dll"
    Delete "$INSTDIRpluginslibsimple.dll"
    Delete "$INSTDIRpluginslibtoc.dll"
    Delete "$INSTDIRpluginslibyahoo.dll"
    Delete "$INSTDIRpluginslibxmpp.dll"
    Delete "$INSTDIRpluginslog_reader.dll"
    Delete "$INSTDIRpluginsmarkerline.dll"
    Delete "$INSTDIRpluginsnewline.dll"
    Delete "$INSTDIRpluginsnotify.dll"
    Delete "$INSTDIRpluginsofflinemsg.dll"
    Delete "$INSTDIRpluginsperl.dll"
    Delete "$INSTDIRpluginspidginrc.dll"
    Delete "$INSTDIRpluginspsychic.dll"
    Delete "$INSTDIRpluginsrelnot.dll"
    Delete "$INSTDIRpluginssendbutton.dll"
    Delete "$INSTDIRpluginsspellchk.dll"
    Delete "$INSTDIRpluginsssl-nss.dll"
    Delete "$INSTDIRpluginsssl.dll"
    Delete "$INSTDIRpluginsstatenotify.dll"
    Delete "$INSTDIRpluginstcl.dll"
    Delete "$INSTDIRpluginsticker.dll"
    Delete "$INSTDIRpluginstimestamp.dll"
    Delete "$INSTDIRpluginstimestamp_format.dll"
    Delete "$INSTDIRpluginswin2ktrans.dll"
    Delete "$INSTDIRpluginswinprefs.dll"
    Delete "$INSTDIRpluginsxmppconsole.dll"
    RMDir "$INSTDIRplugins"
    RMDir /r "$INSTDIRsasl2"
    Delete "$INSTDIRsoundspurplealert.wav"
    Delete "$INSTDIRsoundspurplelogin.wav"
    Delete "$INSTDIRsoundspurplelogout.wav"
    Delete "$INSTDIRsoundspurplereceive.wav"
    Delete "$INSTDIRsoundspurplesend.wav"
    RMDir "$INSTDIRsoundspurple"
    RMDir "$INSTDIRsounds"
    Delete "$INSTDIRfreebl3.dll"
    Delete "$INSTDIRidletrack.dll"
    Delete "$INSTDIRlibgtkspell.dll"
    Delete "$INSTDIRlibjabber.dll"
    Delete "$INSTDIRlibmeanwhile-1.dll"
    Delete "$INSTDIRliboscar.dll"
    Delete "$INSTDIRlibpurple.dll"
    Delete "$INSTDIRlibsasl.dll"
    Delete "$INSTDIRlibsilc-1-1-2.dll"
    Delete "$INSTDIRlibsilcclient-1-1-2.dll"
    Delete "$INSTDIRlibxml2.dll"
    Delete "$INSTDIRnspr4.dll"
    Delete "$INSTDIRnss3.dll"
    Delete "$INSTDIRnssckbi.dll"
    Delete "$INSTDIRpidgin.dll"
    Delete "$INSTDIRpidgin.exe"
    Delete "$INSTDIRplc4.dll"
    Delete "$INSTDIRplds4.dll"
    Delete "$INSTDIRsmime3.dll"
    Delete "$INSTDIRsoftokn3.dll"
    Delete "$INSTDIRssl3.dll"
    Delete "$INSTDIR${PIDGIN_UNINST_EXE}"
    !ifdef DEBUG
    Delete "$INSTDIRexchndl.dll"
    !endif
    Delete "$INSTDIRinstall.log"

    ;Try to remove Pidgin install dir (only if empty)
    RMDir "$INSTDIR"

    ; Shortcuts..
    Delete "$DESKTOPPidgin.lnk"

    Goto done

  cant_uninstall:
    MessageBox MB_OK $(un.PIDGIN_UNINSTALL_ERROR_1) /SD IDOK
    Quit

  no_rights:
    MessageBox MB_OK $(un.PIDGIN_UNINSTALL_ERROR_2) /SD IDOK
    Quit

  done:
SectionEnd ; end of uninstall section

;--------------------------------
;Descriptions
!insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
  !insertmacro MUI_DESCRIPTION_TEXT ${SecPidgin}
        $(PIDGIN_SECTION_DESCRIPTION)
!ifdef WITH_GTK
  !insertmacro MUI_DESCRIPTION_TEXT ${SecGtk}
        $(GTK_SECTION_DESCRIPTION)
!endif

  !insertmacro MUI_DESCRIPTION_TEXT ${SecShortcuts}
        $(PIDGIN_SHORTCUTS_SECTION_DESCRIPTION)
  !insertmacro MUI_DESCRIPTION_TEXT ${SecDesktopShortcut}
        $(PIDGIN_DESKTOP_SHORTCUT_DESC)
  !insertmacro MUI_DESCRIPTION_TEXT ${SecStartMenuShortcut}
        $(PIDGIN_STARTMENU_SHORTCUT_DESC)

  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheck}
        $(PIDGIN_SPELLCHECK_SECTION_DESCRIPTION)
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckBreton}
        "$(PIDGIN_SPELLCHECK_BRETON) (862kb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckCatalan}
        "$(PIDGIN_SPELLCHECK_CATALAN) (3.9Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckCzech}
        "$(PIDGIN_SPELLCHECK_CZECH) (17Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckWelsh}
        "$(PIDGIN_SPELLCHECK_WELSH) (4.2Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckDanish}
        "$(PIDGIN_SPELLCHECK_DANISH) (6.9Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckGerman}
        "$(PIDGIN_SPELLCHECK_GERMAN) (5.4Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckGreek}
        "$(PIDGIN_SPELLCHECK_GREEK) (7.1Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckEnglish}
        "$(PIDGIN_SPELLCHECK_ENGLISH) (2.3Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckEsperanto}
        "$(PIDGIN_SPELLCHECK_ESPERANTO) (5.7Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckSpanish}
        "$(PIDGIN_SPELLCHECK_SPANISH) (7.0Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckFaroese}
        "$(PIDGIN_SPELLCHECK_FAROESE) (913kb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckFrench}
        "$(PIDGIN_SPELLCHECK_FRENCH) (9.3Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckItalian}
        "$(PIDGIN_SPELLCHECK_ITALIAN) (770kb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckDutch}
        "$(PIDGIN_SPELLCHECK_DUTCH) (3.7Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckNorwegian}
        "$(PIDGIN_SPELLCHECK_NORWEGIAN) (3.2Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckPolish}
        "$(PIDGIN_SPELLCHECK_POLISH) (9.3Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckPortuguese}
        "$(PIDGIN_SPELLCHECK_PORTUGUESE) (5.5Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckRomanian}
        "$(PIDGIN_SPELLCHECK_ROMANIAN) (906kb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckRussian}
        "$(PIDGIN_SPELLCHECK_RUSSIAN) (11Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckSlovak}
        "$(PIDGIN_SPELLCHECK_SLOVAK) (8.0Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckSwedish}
        "$(PIDGIN_SPELLCHECK_SWEDISH) (2.2Mb)"
  !insertmacro MUI_DESCRIPTION_TEXT ${SecSpellCheckUkrainian}
        "$(PIDGIN_SPELLCHECK_UKRAINIAN) (12Mb)"
!insertmacro MUI_FUNCTION_DESCRIPTION_END

;--------------------------------
;Functions

; Default the URI handler checkboxes if Pidgin is the current handler or if there is no handler
Function SelectURIHandlerSelections
  Push $R0
  Push $R1
  Push $R2
  Push $R3

  ; Start with the first URI handler
  IntOp $R0 ${SecURIHandlers} + 1

  start:
  ; If it is the end of the section group, stop
  SectionGetFlags $R0 $R1
  IntOp $R2 $R1 & ${SF_SECGRPEND}
  IntCmp $R2 ${SF_SECGRPEND} done

  SectionGetText $R0 $R2
  ;Strip the trailing ':'
  StrLen $R3 $R2
  IntOp $R3 $R3 - 1
  StrCpy $R2 $R2 $R3

  ClearErrors
  ReadRegStr $R3 HKCR "$R2" ""
  IfErrors default_on ;there is no current handler

  Push $R2
  Call CheckIfPidginIsCurrentURIHandler
  Pop $R3

  ; If Pidgin isn't the current handler, we don't steal it automatically
  IntCmp $R3 0 end_loop

  ;We default the URI handler checkbox on
  default_on:
  IntOp $R1 $R1 | ${SF_SELECTED} ; Select
  SectionSetFlags $R0 $R1

  end_loop:
  IntOp $R0 $R0 + 1 ;Advance to the next section
  Goto start

  done:
  Pop $R3
  Pop $R2
  Pop $R1
  Pop $R0
FunctionEnd ;SelectURIHandlerSections

; Check if Pidgin is the current handler
; Returns a boolean on the stack
!macro CheckIfPidginIsCurrentURIHandlerMacro UN
Function ${UN}CheckIfPidginIsCurrentURIHandler
  Exch $R0
  ClearErrors

  ReadRegStr $R0 HKCR "$R0shellOpencommand" ""
  IfErrors 0 +3
    IntOp $R0 0 + 0
    Goto done

  !ifdef __UNINSTALL__
  ${un.WordFind} "$R0" "pidgin.exe" "E+1{" $R0
  !else
  ${WordFind} "$R0" "pidgin.exe" "E+1{" $R0
  !endif
  IntOp $R0 0 + 1
  IfErrors 0 +2
    IntOp $R0 0 + 0

  done:
  Exch $R0
FunctionEnd
!macroend
!insertmacro CheckIfPidginIsCurrentURIHandlerMacro ""
!insertmacro CheckIfPidginIsCurrentURIHandlerMacro "un."

; If Pidgin is the current URI handler for the specified protocol, remove it.
Function un.UnregisterURIHandler
  Exch $R0
  Push $R1

  Push $R0
  Call un.CheckIfPidginIsCurrentURIHandler
  Pop $R1

  ; If Pidgin isn't the current handler, leave it as-is
  IntCmp $R1 0 done

  ;Unregister the URI handler
  DetailPrint "Unregistering $R0 URI Handler"
  DeleteRegKey HKCR "$R0"

  done:
  Pop $R1
  Pop $R0
FunctionEnd

Function RegisterURIHandler
  Exch $R0
  DetailPrint "Registering $R0 URI Handler"
  DeleteRegKey HKCR "$R0"
  WriteRegStr HKCR "$R0" "" "URL:$R0"
  WriteRegStr HKCR "$R0" "URL Protocol" ""
  WriteRegStr HKCR "$R0DefaultIcon" "" "$INSTDIRpidgin.exe"
  WriteRegStr HKCR "$R0shell" "" ""
  WriteRegStr HKCR "$R0shellOpen" "" ""
  WriteRegStr HKCR "$R0shellOpencommand" "" "$INSTDIRpidgin.exe --protocolhandler=%1"
  Pop $R0
FunctionEnd


!macro CheckUserInstallRightsMacro UN
Function ${UN}CheckUserInstallRights
  Push $0
  Push $1
  ClearErrors
  UserInfo::GetName
  IfErrors Win9x
  Pop $0
  UserInfo::GetAccountType
  Pop $1

  StrCmp $1 "Admin" 0 +3
    StrCpy $1 "HKLM"
    Goto done
  StrCmp $1 "Power" 0 +3
    StrCpy $1 "HKLM"
    Goto done
  StrCmp $1 "User" 0 +3
    StrCpy $1 "HKCU"
    Goto done
  StrCmp $1 "Guest" 0 +3
    StrCpy $1 "NONE"
    Goto done
  ; Unknown error
  StrCpy $1 "NONE"
  Goto done

  Win9x:
    StrCpy $1 "HKLM"

  done:
    Exch $1
    Exch
    Pop $0
FunctionEnd
!macroend
!insertmacro CheckUserInstallRightsMacro ""
!insertmacro CheckUserInstallRightsMacro "un."

;
; Usage:
;   Push $0 ; Path string
;   Call VerifyDir
;   Pop $0 ; 0 - Bad path  1 - Good path
;
Function VerifyDir
  Exch $0
  Push $1
  Push $2
  Loop:
    IfFileExists $0 dir_exists
    StrCpy $1 $0 ; save last
    ${GetParent} $0 $0
    StrLen $2 $0
    ; IfFileExists "C:" on xp returns true and on win2k returns false
    ; So we're done in such a case..
    IntCmp $2 2 loop_done
    ; GetParent of "C:" returns ""
    IntCmp $2 0 loop_done
    Goto Loop

  loop_done:
    StrCpy $1 "$0GaImFooB"
    ; Check if we can create dir on this drive..
    ClearErrors
    CreateDirectory $1
    IfErrors DirBad DirGood

  dir_exists:
    ClearErrors
    FileOpen $1 "$0pidginfoo.bar" w
    IfErrors PathBad PathGood

    DirGood:
      RMDir $1
      Goto PathGood1

    DirBad:
      RMDir $1
      Goto PathBad1

    PathBad:
      FileClose $1
      Delete "$0pidginfoo.bar"
      PathBad1:
      StrCpy $0 "0"
      Push $0
      Goto done

    PathGood:
      FileClose $1
      Delete "$0pidginfoo.bar"
      PathGood1:
      StrCpy $0 "1"
      Push $0

  done:
  Exch 3 ; The top of the stack contains the output variable
  Pop $0
  Pop $2
  Pop $1
FunctionEnd

Function .onVerifyInstDir
  Push $0
  Push $INSTDIR
  Call VerifyDir
  Pop $0
  StrCmp $0 "0" 0 dir_good
  Pop $0
  Abort

  dir_good:
  Pop $0
FunctionEnd

;
; Usage:
; Call DoWeNeedGtk
; First Pop:
;   0 - We have the correct version
;       Second Pop: Key where Version was found
;   1 - We have an old version that should work, prompt user for optional upgrade
;       Second Pop: HKLM or HKCU depending on where GTK was found.
;   2 - We have an old version that needs to be upgraded
;       Second Pop: HKLM or HKCU depending on where GTK was found.
;   3 - We don't have Gtk+ at all
;       Second Pop: "NONE, HKLM or HKCU" depending on our rights..
;
Function DoWeNeedGtk
  ; Logic should be:
  ; - Check what user rights we have (HKLM or HKCU)
  ;   - If HKLM rights..
  ;     - Only check HKLM key for GTK+
  ;       - If installed to HKLM, check it and return.
  ;   - If HKCU rights..
  ;     - First check HKCU key for GTK+
  ;       - if good or bad exists stop and ret.
  ;     - If no hkcu gtk+ install, check HKLM
  ;       - If HKLM ver exists but old, return as if no ver exits.
  ;   - If no rights
  ;     - Check HKLM
  Push $0
  Push $1
  Push $2
  Push $3

  Call CheckUserInstallRights
  Pop $1
  StrCmp $1 "HKLM" check_hklm
  StrCmp $1 "HKCU" check_hkcu check_hklm
    check_hkcu:
      ReadRegStr $0 HKCU ${GTK_REG_KEY} "Version"
      StrCpy $2 "HKCU"
      StrCmp $0 "" check_hklm have_gtk

    check_hklm:
      ReadRegStr $0 HKLM ${GTK_REG_KEY} "Version"
      StrCpy $2 "HKLM"
      StrCmp $0 "" no_gtk have_gtk

  have_gtk:
    ; GTK+ is already installed; check version.
    ; Change this to not even run the GTK installer if this version is already installed.
    ${VersionCompare} ${GTK_INSTALL_VERSION} $0 $3
    IntCmp $3 1 +1 good_version good_version
    ${VersionCompare} ${GTK_MIN_VERSION} $0 $3

      ; Bad version. If hklm ver and we have hkcu or no rights.. return no gtk
      StrCmp $1 "NONE" no_gtk ; if no rights.. can't upgrade
      StrCmp $1 "HKCU" 0 +2   ; if HKLM can upgrade..
      StrCmp $2 "HKLM" no_gtk ; have hkcu rights.. if found hklm ver can't upgrade..
      Push $2
      IntCmp $3 1 +3
        Push "1" ; Optional Upgrade
        Goto done
        Push "2" ; Mandatory Upgrade
        Goto done

  good_version:
    StrCmp $2 "HKLM" have_hklm_gtk have_hkcu_gtk
      have_hkcu_gtk:
        ; Have HKCU version
        ReadRegStr $0 HKCU ${GTK_REG_KEY} "Path"
        Goto good_version_cont

      have_hklm_gtk:
        ReadRegStr $0 HKLM ${GTK_REG_KEY} "Path"
        Goto good_version_cont

    good_version_cont:
      Push $0  ; The path to existing GTK+
      Push "0"
      Goto done

  no_gtk:
    Push $1 ; our rights
    Push "3"
    Goto done

  done:
  ; The top two items on the stack are what we want to return
  Exch 4
  Pop $1
  Exch 4
  Pop $0
  Pop $3
  Pop $2
FunctionEnd


!macro RunCheckMacro UN
Function ${UN}RunCheck
  Push $R0
  Push $R1

  IntOp $R1 0 + 0
  retry_runcheck:
  ; Close the Handle (needed if we're retrying)
  IntCmp $R1 0 +2
    System::Call 'kernel32::CloseHandle(i $R1) i .R1'
  System::Call 'kernel32::CreateMutexA(i 0, i 0, t "pidgin_is_running") i .R1 ?e'
  Pop $R0
  IntCmp $R0 0 +3 ;This could check for ERROR_ALREADY_EXISTS(183), but lets just assume
    MessageBox MB_RETRYCANCEL|MB_ICONEXCLAMATION $(PIDGIN_IS_RUNNING) /SD IDCANCEL IDRETRY retry_runcheck
    Abort

  ; Close the Handle (If we don't do this, the uninstaller called from within will fail)
  ; This is not optimal because there is a (small) window of time when a new process could start
  System::Call 'kernel32::CloseHandle(i $R1) i .R1'

  Pop $R1
  Pop $R0
FunctionEnd
!macroend
!insertmacro RunCheckMacro ""
!insertmacro RunCheckMacro "un."

Function .onInit
  Push $R0
  Push $R1
  Push $R2
  Push $R3 ; This is only used for the Parameters throughout the function

  ${GetParameters} $R3

  IntOp $R1 0 + 0
  retry_runcheck:
  ; Close the Handle (needed if we're retrying)
  IntCmp $R1 0 +2
    System::Call 'kernel32::CloseHandle(i $R1) i .R1'
  System::Call 'kernel32::CreateMutexA(i 0, i 0, t "pidgin_installer_running") i .R1 ?e'
  Pop $R0
  IntCmp $R0 0 +3 ;This could check for ERROR_ALREADY_EXISTS(183), but lets just assume
    MessageBox MB_RETRYCANCEL|MB_ICONEXCLAMATION $(INSTALLER_IS_RUNNING) /SD IDCANCEL IDRETRY retry_runcheck
    Abort

  ; Allow installer to run even if pidgin is running via "/NOPIDGINRUNCHECK=1"
  ; This is useful for testing
  ClearErrors
  ${GetOptions} "$R3" "/NOPIDGINRUNCHECK=" $R1
  IfErrors 0 +2
  Call RunCheck

  StrCpy $name "Pidgin ${PIDGIN_VERSION}"
  StrCpy $SPELLCHECK_SEL ""

  ;Try to copy the old Gaim installer Lang Reg. key
  ;(remove it after we're done to prevent this being done more than once)
  ClearErrors
  ReadRegStr $R0 HKCU "${PIDGIN_REG_KEY}" "Installer Language"
  IfErrors 0 +5
  ClearErrors
  ReadRegStr $R0 HKCU "${OLD_GAIM_REG_KEY}" "Installer Language"
  IfErrors +3
  DeleteRegValue HKCU "${OLD_GAIM_REG_KEY}" "Installer Language"
  WriteRegStr HKCU "${PIDGIN_REG_KEY}" "Installer Language" "$R0"

  !insertmacro SetSectionFlag ${SecSpellCheck} ${SF_RO}
  !insertmacro UnselectSection ${SecSpellCheck}

  ;Mark the dictionaries that are already installed as readonly
  Call SelectAndDisableInstalledDictionaries

  ;Preselect the URI handlers as appropriate
  Call SelectURIHandlerSelections

  ;Preselect the "shortcuts" checkboxes according to the previous installation
  ClearErrors
  ;Make sure that there was a previous installation
  ReadRegStr $R0 HKCU "${PIDGIN_REG_KEY}" "Installer Language"
  IfErrors done_preselecting_shortcuts
    ;Does the Desktop shortcut exist?
    GetFileTime "$DESKTOPPidgin.lnk" $R0 $R0
    IfErrors +1 +5
    ClearErrors
    SetShellVarContext "all"
    GetFileTime "$DESKTOPPidgin.lnk" $R0 $R0
    IfErrors preselect_startmenu_shortcut ;Desktop Shortcut if off by default
    !insertmacro SelectSection ${SecDesktopShortcut}
  preselect_startmenu_shortcut:
    ;Reset ShellVarContext because we may have changed it
    SetShellVarContext "current"
    ClearErrors
    ;Does the StartMenu shortcut exist?
    GetFileTime "$SMPROGRAMSPidgin.lnk" $R0 $R0
    IfErrors +1 done_preselecting_shortcuts ;StartMenu Shortcut is on by default
    ClearErrors
    SetShellVarContext "all"
    GetFileTime "$SMPROGRAMSPidgin.lnk" $R0 $R0
    IfErrors +1 done_preselecting_shortcuts ;StartMenu Shortcut is on by default
    !insertmacro UnselectSection ${SecStartMenuShortcut}
  done_preselecting_shortcuts:
  ;Reset ShellVarContext because we may have changed it
  SetShellVarContext "current"

  StrCpy $ISSILENT "/S"
  ; GTK installer has two silent states - one with Message boxes, one without
  ; If pidgin installer was run silently, we want to supress gtk installer msg boxes.
  IfSilent 0 +2
    StrCpy $ISSILENT "/NOUI"

  ClearErrors
  ${GetOptions} "$R3" "/L=" $R1
  IfErrors +3
  StrCpy $LANGUAGE $R1
  Goto skip_lang

  ; Select Language
    ; Display Language selection dialog
    !insertmacro MUI_LANGDLL_DISPLAY
    skip_lang:

  ClearErrors
  ${GetOptions} "$R3" "/DS=" $R1
  IfErrors +8
  SectionGetFlags ${SecDesktopShortcut} $R2
  StrCmp "1" $R1 0 +2
  IntOp $R2 $R2 | ${SF_SELECTED}
  StrCmp "0" $R1 0 +3
  IntOp $R1 ${SF_SELECTED} ~
  IntOp $R2 $R2 & $R1
  SectionSetFlags ${SecDesktopShortcut} $R2

  ClearErrors
  ${GetOptions} "$R3" "/SMS=" $R1
  IfErrors +8
  SectionGetFlags ${SecStartMenuShortcut} $R2
  StrCmp "1" $R1 0 +2
  IntOp $R2 $R2 | ${SF_SELECTED}
  StrCmp "0" $R1 0 +3
  IntOp $R1 ${SF_SELECTED} ~
  IntOp $R2 $R2 & $R1
  SectionSetFlags ${SecStartMenuShortcut} $R2

  ; If install path was set on the command, use it.
  StrCmp $INSTDIR "" 0 instdir_done

  ;  If pidgin or gaim is currently installed, we should default to where it is currently installed
  ClearErrors
  ReadRegStr $INSTDIR HKCU "${PIDGIN_REG_KEY}" ""
  IfErrors +2
  StrCmp $INSTDIR "" 0 instdir_done
  ClearErrors
  ReadRegStr $INSTDIR HKLM "${PIDGIN_REG_KEY}" ""
  IfErrors +2
  StrCmp $INSTDIR "" 0 instdir_done

  Call CheckUserInstallRights
  Pop $R0

  StrCmp $R0 "HKLM" 0 user_dir
    StrCpy $INSTDIR "$PROGRAMFILESPidgin"
    Goto instdir_done
  user_dir:
    Push $SMPROGRAMS
    ${GetParent} $SMPROGRAMS $R2
    ${GetParent} $R2 $R2
    StrCpy $INSTDIR "$R2Pidgin"

  instdir_done:
;LogSet on
  Pop $R3
  Pop $R2
  Pop $R1
  Pop $R0
FunctionEnd

Function un.onInit
  Call un.RunCheck
  StrCpy $name "Pidgin ${PIDGIN_VERSION}"
;LogSet on

  ; Get stored language preference
  !insertmacro MUI_UNGETLANGUAGE

FunctionEnd

; Page enter and exit functions..

Function preWelcomePage
  Push $R0

!ifndef WITH_GTK
  ; If this installer dosn't have GTK, check whether we need it.
  ; We do this here and not in .onInit because language change in
  ; .onInit doesn't take effect until it is finished.
  Call DoWeNeedGtk
  Pop $R0
  Pop $GTK_FOLDER

  IntCmp $R0 1 done done
  MessageBox MB_OK $(GTK_INSTALLER_NEEDED) /SD IDOK
  Quit

  done:

!else
  Push $R1
  Push $R2

  Call DoWeNeedGtk
  Pop $R0
  Pop $R2
  IntCmp $R0 1 gtk_selection_done gtk_not_mandatory
    ; Make the GTK+ Section RO if it is required.
    !insertmacro SetSectionFlag ${SecGtk} ${SF_RO}
    Goto gtk_selection_done
  gtk_not_mandatory:
    ; Don't select the GTK+ section if we already have this version or newer installed
    !insertmacro UnselectSection ${SecGtk}
  gtk_selection_done:

  ; If on Win95/98/ME warn them that the GTK+ version wont work
  ${Unless} ${IsNT}
    !insertmacro UnselectSection ${SecGtk}
    !insertmacro SetSectionFlag ${SecGtk} ${SF_RO}
    MessageBox MB_OK $(GTK_WINDOWS_INCOMPATIBLE) /SD IDOK
    IntCmp $R0 1 done done ; Upgrade isn't optional - abort if we don't have a suitable version
    Quit
  ${EndIf}

  done:
  Pop $R2
  Pop $R1
!endif
  Pop $R0
FunctionEnd

!ifdef WITH_GTK
Function preGtkDirPage
  Push $R0
  Push $R1
  Call DoWeNeedGtk
  Pop $R0
  Pop $R1

  IntCmp $R0 2 +2 +2 no_gtk
  StrCmp $R0 "3" no_gtk no_gtk

  ; Don't show dir selector.. Upgrades are done to existing path..
  Pop $R1
  Pop $R0
  Abort

  no_gtk:
    StrCmp $R1 "NONE" 0 no_gtk_cont
      ; Got no install rights..
      Pop $R1
      Pop $R0
      Abort
    no_gtk_cont:
      ; Suggest path..
      StrCmp $R1 "HKCU" 0 hklm1
        ${GetParent} $SMPROGRAMS $R0
        ${GetParent} $R0 $R0
        StrCpy $R0 "$R0GTK2.0"
        Goto got_path
      hklm1:
        StrCpy $R0 "${GTK_DEFAULT_INSTALL_PATH}"

   got_path:
     StrCpy $name "GTK+ ${GTK_INSTALL_VERSION}"
     StrCpy $GTK_FOLDER $R0
     Pop $R1
     Pop $R0
FunctionEnd

Function postGtkDirPage
  Push $R0
  StrCpy $name "Pidgin ${PIDGIN_VERSION}"
  Push $GTK_FOLDER
  Call VerifyDir
  Pop $R0
  StrCmp $R0 "0" 0 done
    MessageBox MB_OK $(GTK_BAD_INSTALL_PATH) /SD IDOK
    Pop $R0
    Abort
  done:
  Pop $R0
FunctionEnd
!endif

; SpellChecker Related Functions
;-------------------------------

; Convert the a Section index to the language code
; Push the section index onto the stack and pop off the language code after the call
; This will set the error code, if no match is found
Function GetLangCodeForSection
  ClearErrors
  Push $R0
  Exch
  Pop $R0 ;This is the section index

  IntCmp $R0 ${SecSpellCheckBreton} 0 +3 +3
  StrCpy $R0 "br"
  Goto done
  IntCmp $R0 ${SecSpellCheckCatalan} 0 +3 +3
  StrCpy $R0 "ca"
  Goto done
  IntCmp $R0 ${SecSpellCheckCzech} 0 +3 +3
  StrCpy $R0 "cs"
  Goto done
  IntCmp $R0 ${SecSpellCheckWelsh} 0 +3 +3
  StrCpy $R0 "cy"
  Goto done
  IntCmp $R0 ${SecSpellCheckDanish} 0 +3 +3
  StrCpy $R0 "da"
  Goto done
  IntCmp $R0 ${SecSpellCheckGerman} 0 +3 +3
  StrCpy $R0 "de"
  Goto done
  IntCmp $R0 ${SecSpellCheckGreek} 0 +3 +3
  StrCpy $R0 "el"
  Goto done
  IntCmp $R0 ${SecSpellCheckEnglish} 0 +3 +3
  StrCpy $R0 "en"
  Goto done
  IntCmp $R0 ${SecSpellCheckEsperanto} 0 +3 +3
  StrCpy $R0 "eo"
  Goto done
  IntCmp $R0 ${SecSpellCheckSpanish} 0 +3 +3
  StrCpy $R0 "es"
  Goto done
  IntCmp $R0 ${SecSpellCheckFaroese} 0 +3 +3
  StrCpy $R0 "fo"
  Goto done
  IntCmp $R0 ${SecSpellCheckFrench} 0 +3 +3
  StrCpy $R0 "fr"
  Goto done
  IntCmp $R0 ${SecSpellCheckItalian} 0 +3 +3
  StrCpy $R0 "it"
  Goto done
  IntCmp $R0 ${SecSpellCheckDutch} 0 +3 +3
  StrCpy $R0 "nl"
  Goto done
  IntCmp $R0 ${SecSpellCheckNorwegian} 0 +3 +3
  StrCpy $R0 "no"
  Goto done
  IntCmp $R0 ${SecSpellCheckPolish} 0 +3 +3
  StrCpy $R0 "pl"
  Goto done
  IntCmp $R0 ${SecSpellCheckPortuguese} 0 +3 +3
  StrCpy $R0 "pt"
  Goto done
  IntCmp $R0 ${SecSpellCheckRomanian} 0 +3 +3
  StrCpy $R0 "ro"
  Goto done
  IntCmp $R0 ${SecSpellCheckRussian} 0 +3 +3
  StrCpy $R0 "ru"
  Goto done
  IntCmp $R0 ${SecSpellCheckSlovak} 0 +3 +3
  StrCpy $R0 "sk"
  Goto done
  IntCmp $R0 ${SecSpellCheckSwedish} 0 +3 +3
  StrCpy $R0 "sv"
  Goto done
  IntCmp $R0 ${SecSpellCheckUkrainian} 0 +3 +3
  StrCpy $R0 "uk"
  Goto done

  SetErrors

  done:
  Exch $R0
FunctionEnd ;GetLangCodeForSection

; Select and Disable any Sections that have currently installed dictionaries
Function SelectAndDisableInstalledDictionaries
  Push $R0
  Push $R1
  Push $R2

  ; Start with the first language dictionary
  IntOp $R0 ${SecSpellCheck} + 1

  start:
  ; If it is the end of the section group, stop
  SectionGetFlags $R0 $R1
  IntOp $R2 $R1 & ${SF_SECGRPEND}
  IntCmp $R2 ${SF_SECGRPEND} done

  Push $R0
  Call GetLangCodeForSection
  Pop $R2
  IfErrors end_loop
  ReadRegStr $R2 HKLM "${ASPELL_REG_KEY}-$R2" "" ; Check that the dictionary is installed
  StrCmp $R2 "" end_loop ; If it isn't installed, skip to the next item
  IntOp $R1 $R1 | ${SF_RO} ; Mark Readonly
  IntOp $R1 $R1 | ${SF_SELECTED} ; Select
  SectionSetFlags $R0 $R1

  end_loop:
  IntOp $R0 $R0 + 1 ;Advance to the next section
  Goto start

  done:
  Pop $R2
  Pop $R1
  Pop $R0
FunctionEnd

Function InstallAspellAndDict
  Push $R0
  Exch
  Call GetLangCodeForSection
  Pop $R0 ;This is the language code
  Push $R1

  IfErrors done ; We weren't able to convert the section to lang code

  retry:
    Call InstallAspell
    Pop $R1
    StrCmp $R1 "" +3
    StrCmp $R1 "cancel" done
    MessageBox MB_RETRYCANCEL "$(PIDGIN_SPELLCHECK_ERROR) : $R1" /SD IDCANCEL IDRETRY retry IDCANCEL done

  retry_dict:
    Push $R0
    Call InstallAspellDictionary
    Pop $R1
    StrCmp $R1 "" +3
    StrCmp $R1 "cancel" done
    MessageBox MB_RETRYCANCEL "$(PIDGIN_SPELLCHECK_DICT_ERROR) : $R1" /SD IDCANCEL IDRETRY retry_dict

  done:

  Pop $R1
  Pop $R0
FunctionEnd

Function InstallAspell
  Push $R0
  Push $R1
  Push $R2

  check:
  ClearErrors
  ReadRegDWORD $R0 HKLM ${ASPELL_REG_KEY} "AspellVersion"
  IntCmp $R0 15 installed

  ; If this is the check after installation, don't infinite loop on failure
  StrCmp $R1 "$TEMPaspell_installer.exe" 0 +3
    StrCpy $R0 $(ASPELL_INSTALL_FAILED)
    Goto done

  ; We need to download and install aspell
  StrCpy $R1 "$TEMPaspell_installer.exe"
  StrCpy $R2 "${DOWNLOADER_URL}?version=${PIDGIN_VERSION}&dl_pkg=aspell_core"
  DetailPrint "Downloading Aspell... ($R2)"
  NSISdl::download /TIMEOUT=10000 $R2 $R1
  Pop $R0
  StrCmp $R0 "success" +2
    Goto done
  ExecWait '"$R1"'
  Delete $R1
  Goto check ; Check that it is now installed correctly

  installed: ;Aspell is currently installed, no error message
    DetailPrint "Aspell is installed"
    StrCpy $R0 ''

  done:
  Pop $R2
  Pop $R1
  Exch $R0
FunctionEnd

Function InstallAspellDictionary
  Push $R0
  Exch
  Pop $R0 ;This is the language code
  Push $R1
  Push $R2
  Push $R3
  Push $R4

  check:
  ClearErrors
  ReadRegStr $R2 HKLM "${ASPELL_REG_KEY}-$R0" ""
  StrCmp $R2 "" 0 installed

  ; If this is the check after installation, don't infinite loop on failure
  StrCmp $R1 "$TEMPaspell_dict-$R0.exe" 0 +3
    StrCpy $R0 $(ASPELL_INSTALL_FAILED)
    Goto done

  ; We need to download and install aspell
  StrCpy $R1 "$TEMPaspell_dict-$R0.exe"
  StrCpy $R3 "${DOWNLOADER_URL}?version=${PIDGIN_VERSION}&dl_pkg=lang_$R0"
  DetailPrint "Downloading the Aspell $R0 Dictionary... ($R3)"
  NSISdl::download /TIMEOUT=10000 $R3 $R1
  Pop $R3
  StrCmp $R3 "success" +3
    StrCpy $R0 $R3
    Goto done
  ; Use a specific temporary $OUTDIR for each dictionary because the installer doesn't clean up after itself
  StrCpy $R4 "$OUTDIR"
  SetOutPath "$TEMPaspell_dict-$R0"
  ExecWait '"$R1"'
  SetOutPath "$R4"
  RMDir /r "$TEMPaspell_dict-$R0"
  Delete $R1
  Goto check ; Check that it is now installed correctly

  installed: ;The dictionary is currently installed, no error message
    DetailPrint "Aspell $R0 Dictionary is installed"
    StrCpy $R0 ''

  done:
  Pop $R4
  Pop $R3
  Pop $R2
  Pop $R1
  Exch $R0
FunctionEnd
langmacros.nsh:
;;
;; Windows Pidgin NSIS installer language macros
;;

!macro PIDGIN_MACRO_DEFAULT_STRING LABEL VALUE
  !ifndef "${LABEL}"
    !define "${LABEL}" "${VALUE}"
    !ifdef INSERT_DEFAULT
      !warning "${LANG} lang file missing ${LABEL}, using default..."
    !endif
  !endif
!macroend

!macro PIDGIN_MACRO_LANGSTRING_INSERT LABEL LANG
  LangString "${LABEL}" "${LANG_${LANG}}" "${${LABEL}}"
  !undef "${LABEL}"
!macroend

!macro PIDGIN_MACRO_LANGUAGEFILE_BEGIN LANG
  !define CUR_LANG "${LANG}"
!macroend

!macro PIDGIN_MACRO_LANGUAGEFILE_END
  !define INSERT_DEFAULT
  !include "${PIDGIN_DEFAULT_LANGFILE}"
  !undef INSERT_DEFAULT

  ; Pidgin Language file Version 3
  ; String labels should match those from the default language file.

  ; Startup checks
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT INSTALLER_IS_RUNNING		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_IS_RUNNING			${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_INSTALLER_NEEDED		${CUR_LANG}

  ; License Page
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_LICENSE_BUTTON			${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_LICENSE_BOTTOM_TEXT		${CUR_LANG}

  ; Components Page
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SECTION_TITLE			${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_SECTION_TITLE			${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SHORTCUTS_SECTION_TITLE	${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_DESKTOP_SHORTCUT_SECTION_TITLE ${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_STARTMENU_SHORTCUT_SECTION_TITLE	${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SECTION_DESCRIPTION		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_SECTION_DESCRIPTION		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SHORTCUTS_SECTION_DESCRIPTION	${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_DESKTOP_SHORTCUT_DESC		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_STARTMENU_SHORTCUT_DESC	${CUR_LANG}

  ; GTK+ Directory Page
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_UPGRADE_PROMPT			${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_WINDOWS_INCOMPATIBLE		${CUR_LANG}

  ; Installer Finish Page
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_FINISH_VISIT_WEB_SITE		${CUR_LANG}

  ; Pidgin Section Prompts and Texts
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_PROMPT_CONTINUE_WITHOUT_UNINSTALL	${CUR_LANG}

  ; GTK+ Section Prompts
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_INSTALL_ERROR			${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT GTK_BAD_INSTALL_PATH		${CUR_LANG}

  ; URI Handler section
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT URI_HANDLERS_SECTION_TITLE		${CUR_LANG}

  ; Uninstall Section Prompts
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT un.PIDGIN_UNINSTALL_ERROR_1		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT un.PIDGIN_UNINSTALL_ERROR_2		${CUR_LANG}

  ; Spellcheck Section Prompts
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_SECTION_TITLE	${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_ERROR		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_DICT_ERROR		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_SECTION_DESCRIPTION	${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT ASPELL_INSTALL_FAILED		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_BRETON		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_CATALAN		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_CZECH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_WELSH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_DANISH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_GERMAN		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_ENGLISH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_GREEK		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_ESPERANTO		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_SPANISH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_FAROESE		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_FRENCH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_ITALIAN		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_DUTCH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_NORWEGIAN		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_POLISH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_PORTUGUESE		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_ROMANIAN		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_RUSSIAN		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_SLOVAK		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_SWEDISH		${CUR_LANG}
  !insertmacro PIDGIN_MACRO_LANGSTRING_INSERT PIDGIN_SPELLCHECK_UKRAINIAN		${CUR_LANG}

  !undef CUR_LANG
!macroend

!macro PIDGIN_MACRO_INCLUDE_LANGFILE LANG FILE
  !insertmacro PIDGIN_MACRO_LANGUAGEFILE_BEGIN "${LANG}"
  !include "${FILE}"
  !insertmacro PIDGIN_MACRO_LANGUAGEFILE_END
!macroend

sample translation:


;;  vim:syn=winbatch:fileencoding=cp1252:
;;
;;  french.nsh
;;
;;  French language strings for the Windows Pidgin NSIS installer.
;;  Windows Code page: 1252
;;
;;  Version 3
;;  Author: Eric Boumaour , 2003-2007.
;;

; Make sure to update the PIDGIN_MACRO_LANGUAGEFILE_END macro in
; langmacros.nsh when updating this file

; Startup Checks
!define INSTALLER_IS_RUNNING			"Le programme d'installation est d�j� en cours d'ex�cution."
!define PIDGIN_IS_RUNNING			"Une instance de Pidgin est en cours d'ex�cution. Veuillez quitter Pidgin et r�essayer."
!define GTK_INSTALLER_NEEDED			"Les biblioth�ques de l'environnement GTK+ ne sont pas install�es ou ont besoin d'une mise � jour.$rVeuillez installer la version ${GTK_MIN_VERSION} ou plus r�cente des biblioth�ques GTK+."

; License Page
!define PIDGIN_LICENSE_BUTTON			"Suivant >"
!define PIDGIN_LICENSE_BOTTOM_TEXT		"$(^Name) est disponible sous licence GNU General Public License (GPL). Le texte de licence suivant est fourni uniquement � titre informatif. $_CLICK"

; Components Page
!define PIDGIN_SECTION_TITLE			"Pidgin client de messagerie instantan�e (obligatoire)"
!define GTK_SECTION_TITLE			"Biblioth�ques GTK+ (obligatoire)"
!define PIDGIN_SHORTCUTS_SECTION_TITLE		"Raccourcis"
!define PIDGIN_DESKTOP_SHORTCUT_SECTION_TITLE	"Bureau"
!define PIDGIN_STARTMENU_SHORTCUT_SECTION_TITLE	"Menu D�marrer"
!define PIDGIN_SECTION_DESCRIPTION		"Fichiers et DLLs de base de Pidgin"
!define GTK_SECTION_DESCRIPTION			"Un ensemble d'outils pour interfaces graphiques multi-plateforme, utilis� par Pidgin"

!define PIDGIN_SHORTCUTS_SECTION_DESCRIPTION	"Raccourcis pour lancer Pidgin"
!define PIDGIN_DESKTOP_SHORTCUT_DESC		"Cr�er un raccourci pour Pidgin sur le bureau"
!define PIDGIN_STARTMENU_SHORTCUT_DESC		"Cr�er un raccourci pour Pidgin dans le menu D�marrer"

; GTK+ Directory Page
!define GTK_UPGRADE_PROMPT			"Une ancienne version des biblioth�ques GTK+ a �t� trouv�e. Voulez-vous la mettre � jour ?$rNote : $(^Name) peut ne pas fonctionner si vous ne le faites pas."
!define GTK_WINDOWS_INCOMPATIBLE		"Windows 95/98/Me est incompatible avec GTK+ version 2.8.0 ou plus r�centes.  GTK+ ${GTK_INSTALL_VERSION} ne sera pas install�.$rSi vous n'avez pas install� GTK+ version ${GTK_MIN_VERSION} ou pkus r�cente, l'installation s'arr�tera."

; Installer Finish Page
!define PIDGIN_FINISH_VISIT_WEB_SITE		"Visitez la page web de Pidgin Windows"

; Pidgin Section Prompts and Texts
!define PIDGIN_PROMPT_CONTINUE_WITHOUT_UNINSTALL	"Impossible de d�sinstaller la version de Pidgin en place. La nouvelle version sera install�e sans supprimer la version en place."

; GTK+ Section Prompts
!define GTK_INSTALL_ERROR			"Erreur lors de l'installation des biblioth�ques GTK+"
!define GTK_BAD_INSTALL_PATH			"Le dossier d'installation ne peut pas �tre cr�� ou n'est pas accessible."

; URL Handler section
!define URI_HANDLERS_SECTION_TITLE		"Gestion des liens (URI)"

; Uninstall Section Prompts
!define un.PIDGIN_UNINSTALL_ERROR_1		"Le programme de d�sinstallation n'a pas retrouv� les entr�es de Pidgin dans la base de registres.$rL'application a peut-�tre �t� install�e par un utilisateur diff�rent."
!define un.PIDGIN_UNINSTALL_ERROR_2		"Vous n'avez pas les permissions pour supprimer cette application."

; Spellcheck Section Prompts
!define PIDGIN_SPELLCHECK_SECTION_TITLE		"Correction orthographique"
!define PIDGIN_SPELLCHECK_ERROR			"Erreur � l'installation du correcteur orthographique"
!define PIDGIN_SPELLCHECK_DICT_ERROR		"Erreur � l'installation du dictionnaire pour le correcteur orthographique"
!define PIDGIN_SPELLCHECK_SECTION_DESCRIPTION	"Correction orthogaphique. (Une connexion internet est n�cessaire pour son installation)"
!define ASPELL_INSTALL_FAILED			"�chec de l'installation"
!define PIDGIN_SPELLCHECK_BRETON		"Breton"
!define PIDGIN_SPELLCHECK_CATALAN		"Catalan"
!define PIDGIN_SPELLCHECK_CZECH			"Tch�que"
!define PIDGIN_SPELLCHECK_WELSH			"Gallois"
!define PIDGIN_SPELLCHECK_DANISH		"Danois"
!define PIDGIN_SPELLCHECK_GERMAN		"Allemand"
!define PIDGIN_SPELLCHECK_GREEK			"Grec"
!define PIDGIN_SPELLCHECK_ENGLISH		"Anglais"
!define PIDGIN_SPELLCHECK_ESPERANTO		"Esp�ranto"
!define PIDGIN_SPELLCHECK_SPANISH		"Espagnol"
!define PIDGIN_SPELLCHECK_FAROESE		"F�ringien"
!define PIDGIN_SPELLCHECK_FRENCH		"Fran�ais"
!define PIDGIN_SPELLCHECK_ITALIAN		"Italien"
!define PIDGIN_SPELLCHECK_DUTCH			"Hollandais"
!define PIDGIN_SPELLCHECK_NORWEGIAN		"Norv�gien"
!define PIDGIN_SPELLCHECK_POLISH		"Polonais"
!define PIDGIN_SPELLCHECK_PORTUGUESE		"Portugais"
!define PIDGIN_SPELLCHECK_ROMANIAN		"Roumain"
!define PIDGIN_SPELLCHECK_RUSSIAN		"Russe"
!define PIDGIN_SPELLCHECK_SLOVAK		"Slovaque"
!define PIDGIN_SPELLCHECK_SWEDISH		"Su�dois"
!define PIDGIN_SPELLCHECK_UKRAINIAN		"Ukrainien"