browser/installer/windows/nsis/uninstaller.nsi
author Julien Cristau <jcristau@mozilla.com>
Thu, 06 Dec 2018 14:47:30 -0500
changeset 501461 021689730ee5825fe63215bf8a6c91670eb5e39c
parent 499226 0b2ac40765b93f823d36fbdb7804594da6a81552
child 511028 d68a1c8025fb7e14047e5b0ba07ebe776c089da7
permissions -rwxr-xr-x
Bug 1512496 - Backed out 1 changesets (bug 675428) for causing bug 1496380. a=backout Backed out changeset 725a692947dd (bug 675428)

# 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/.

# Required Plugins:
# AppAssocReg http://nsis.sourceforge.net/Application_Association_Registration_plug-in
# CityHash    http://dxr.mozilla.org/mozilla-central/source/other-licenses/nsis/Contrib/CityHash
# ShellLink   http://nsis.sourceforge.net/ShellLink_plug-in
# UAC         http://nsis.sourceforge.net/UAC_plug-in

; Set verbosity to 3 (e.g. no script) to lessen the noise in the build logs
!verbose 3

; 7-Zip provides better compression than the lzma from NSIS so we add the files
; uncompressed and use 7-Zip to create a SFX archive of it
SetDatablockOptimize on
SetCompress off
CRCCheck on

RequestExecutionLevel user

Unicode true
ManifestSupportedOS all
ManifestDPIAware true

!addplugindir ./

; Attempt to elevate Standard Users in addition to users that
; are a member of the Administrators group.
!define NONADMIN_ELEVATE

; prevents compiling of the reg write logging.
!define NO_LOG

!define MaintUninstallKey \
 "Software\Microsoft\Windows\CurrentVersion\Uninstall\MozillaMaintenanceService"

Var TmpVal
Var MaintCertKey
Var ShouldOpenSurvey

; Other included files may depend upon these includes!
; The following includes are provided by NSIS.
!include FileFunc.nsh
!include LogicLib.nsh
!include MUI.nsh
!include WinMessages.nsh
!include WinVer.nsh
!include WordFunc.nsh

!insertmacro GetSize
!insertmacro StrFilter
!insertmacro WordReplace

!insertmacro un.GetParent

; The following includes are custom.
!include branding.nsi
!include defines.nsi
!include common.nsh
!include locales.nsi

; This is named BrandShortName helper because we use this for software update
; post update cleanup.
VIAddVersionKey "FileDescription" "${BrandShortName} Helper"
VIAddVersionKey "OriginalFilename" "helper.exe"

!insertmacro AddDisabledDDEHandlerValues
!insertmacro CleanVirtualStore
!insertmacro ElevateUAC
!insertmacro GetLongPath
!insertmacro GetPathFromString
!insertmacro InitHashAppModelId
!insertmacro IsHandlerForInstallDir
!insertmacro IsPinnedToTaskBar
!insertmacro IsUserAdmin
!insertmacro LogDesktopShortcut
!insertmacro LogQuickLaunchShortcut
!insertmacro LogStartMenuShortcut
!insertmacro PinnedToStartMenuLnkCount
!insertmacro RegCleanAppHandler
!insertmacro RegCleanMain
!insertmacro RegCleanUninstall
!insertmacro SetAppLSPCategories
!insertmacro SetBrandNameVars
!insertmacro UpdateShortcutAppModelIDs
!insertmacro UnloadUAC
!insertmacro WriteRegDWORD2
!insertmacro WriteRegStr2

!insertmacro un.ChangeMUIHeaderImage
!insertmacro un.CheckForFilesInUse
!insertmacro un.CleanUpdateDirectories
!insertmacro un.CleanVirtualStore
!insertmacro un.DeleteShortcuts
!insertmacro un.GetLongPath
!insertmacro un.GetSecondInstallPath
!insertmacro un.InitHashAppModelId
!insertmacro un.ManualCloseAppPrompt
!insertmacro un.RegCleanAppHandler
!insertmacro un.RegCleanFileHandler
!insertmacro un.RegCleanMain
!insertmacro un.RegCleanUninstall
!insertmacro un.RegCleanProtocolHandler
!insertmacro un.RemoveQuotesFromPath
!insertmacro un.RemovePrecompleteEntries
!insertmacro un.SetAppLSPCategories
!insertmacro un.SetBrandNameVars

!include shared.nsh

; Helper macros for ui callbacks. Insert these after shared.nsh
!insertmacro OnEndCommon
!insertmacro UninstallOnInitCommon

!insertmacro un.OnEndCommon
!insertmacro un.UninstallUnOnInitCommon

Name "${BrandFullName}"
OutFile "helper.exe"
!ifdef HAVE_64BIT_BUILD
  InstallDir "$PROGRAMFILES64\${BrandFullName}\"
!else
  InstallDir "$PROGRAMFILES32\${BrandFullName}\"
!endif
ShowUnInstDetails nevershow

!define URLUninstallSurvey "https://qsurvey.mozilla.com/s3/FF-Desktop-Post-Uninstall?channel=${UpdateChannel}&version=${AppVersion}&osversion="

################################################################################
# Modern User Interface - MUI

!define MUI_ABORTWARNING
!define MUI_ICON setup.ico
!define MUI_UNICON setup.ico
!define MUI_WELCOMEPAGE_TITLE_3LINES
!define MUI_HEADERIMAGE
!define MUI_HEADERIMAGE_RIGHT
!define MUI_UNWELCOMEFINISHPAGE_BITMAP wizWatermark.bmp

; Use a right to left header image when the language is right to left
!ifdef ${AB_CD}_rtl
!define MUI_HEADERIMAGE_BITMAP_RTL wizHeaderRTL.bmp
!else
!define MUI_HEADERIMAGE_BITMAP wizHeader.bmp
!endif

/**
 * Uninstall Pages
 */
; Welcome Page
!define MUI_PAGE_CUSTOMFUNCTION_PRE un.preWelcome
!define MUI_PAGE_CUSTOMFUNCTION_LEAVE un.leaveWelcome
!insertmacro MUI_UNPAGE_WELCOME

; Custom Uninstall Confirm Page
UninstPage custom un.preConfirm

; Remove Files Page
!insertmacro MUI_UNPAGE_INSTFILES

; Finish Page
!define MUI_FINISHPAGE_SHOWREADME
!define MUI_FINISHPAGE_SHOWREADME_NOTCHECKED
!define MUI_FINISHPAGE_SHOWREADME_TEXT $(UN_SURVEY_CHECKBOX_LABEL)
!define MUI_FINISHPAGE_SHOWREADME_FUNCTION un.Survey
!define MUI_PAGE_CUSTOMFUNCTION_PRE un.preFinish
!insertmacro MUI_UNPAGE_FINISH

; Use the default dialog for IDD_VERIFY for a simple Banner
ChangeUI IDD_VERIFY "${NSISDIR}\Contrib\UIs\default.exe"

################################################################################
# Helper Functions

Function un.Survey
  ; We can't actually call ExecInExplorer here because it's going to have to
  ; make some marshalled COM calls and those are not allowed from within a
  ; synchronous message handler (where we currently are); we'll be thrown
  ; RPC_E_CANTCALLOUT_ININPUTSYNCCALL if we try. So all we can do is record
  ; that we need to make the call later, which we'll do from un.onGUIEnd.
  StrCpy $ShouldOpenSurvey "1"
FunctionEnd

; This function is used to uninstall the maintenance service if the
; application currently being uninstalled is the last application to use the
; maintenance service.
Function un.UninstallServiceIfNotUsed
  ; $0 will store if a subkey exists
  ; $1 will store the first subkey if it exists or an empty string if it doesn't
  ; Backup the old values
  Push $0
  Push $1

  ; The maintenance service always uses the 64-bit registry on x64 systems
  ${If} ${RunningX64}
    SetRegView 64
  ${EndIf}

  ; Figure out the number of subkeys
  StrCpy $0 0
  ${Do}
    EnumRegKey $1 HKLM "Software\Mozilla\MaintenanceService" $0
    ${If} "$1" == ""
      ${ExitDo}
    ${EndIf}
    IntOp $0 $0 + 1
  ${Loop}

  ; Restore back the registry view
  ${If} ${RunningX64}
    SetRegView lastUsed
  ${EndIf}

  ${If} $0 == 0
    ; Get the path of the maintenance service uninstaller.
    ; Look in both the 32-bit and 64-bit registry views.
    SetRegView 32
    ReadRegStr $1 HKLM ${MaintUninstallKey} "UninstallString"
    SetRegView lastused

    ${If} $1 == ""
    ${AndIf} ${RunningX64}
      SetRegView 64
      ReadRegStr $1 HKLM ${MaintUninstallKey} "UninstallString"
      SetRegView lastused
    ${EndIf}

    ; If the uninstall string does not exist, skip executing it
    ${If} $1 != ""
      ; $1 is already a quoted string pointing to the install path
      ; so we're already protected against paths with spaces
      nsExec::Exec "$1 /S"
    ${EndIf}
  ${EndIf}

  ; Restore the old value of $1 and $0
  Pop $1
  Pop $0
FunctionEnd

################################################################################
# Install Sections
; Empty section required for the installer to compile as an uninstaller
Section ""
SectionEnd

################################################################################
# Uninstall Sections

Section "Uninstall"
  SetDetailsPrint textonly
  DetailPrint $(STATUS_UNINSTALL_MAIN)
  SetDetailsPrint none

  ; Delete the app exe to prevent launching the app while we are uninstalling.
  ClearErrors
  ${DeleteFile} "$INSTDIR\${FileMainEXE}"
  ${If} ${Errors}
    ; If the user closed the application it can take several seconds for it to
    ; shut down completely. If the application is being used by another user we
    ; can still delete the files when the system is restarted.
    Sleep 5000
    ${DeleteFile} "$INSTDIR\${FileMainEXE}"
    ClearErrors
  ${EndIf}

  ; setup the application model id registration value
  ${un.InitHashAppModelId} "$INSTDIR" "Software\Mozilla\${AppName}\TaskBarIDs"

  SetShellVarContext current  ; Set SHCTX to HKCU
  ${un.RegCleanMain} "Software\Mozilla"
  ${un.RegCleanUninstall}
  ${un.DeleteShortcuts}

  ; Unregister resources associated with Win7 taskbar jump lists.
  ${If} ${AtLeastWin7}
  ${AndIf} "$AppUserModelID" != ""
    ApplicationID::UninstallJumpLists "$AppUserModelID"
  ${EndIf}

  ; Remove the updates directory
  ${un.CleanUpdateDirectories} "Mozilla\Firefox" "Mozilla\updates"

  ; Remove any app model id's stored in the registry for this install path
  DeleteRegValue HKCU "Software\Mozilla\${AppName}\TaskBarIDs" "$INSTDIR"
  DeleteRegValue HKLM "Software\Mozilla\${AppName}\TaskBarIDs" "$INSTDIR"

  ClearErrors
  WriteRegStr HKLM "Software\Mozilla" "${BrandShortName}InstallerTest" "Write Test"
  ${If} ${Errors}
    StrCpy $TmpVal "HKCU" ; used primarily for logging
  ${Else}
    SetShellVarContext all  ; Set SHCTX to HKLM
    DeleteRegValue HKLM "Software\Mozilla" "${BrandShortName}InstallerTest"
    StrCpy $TmpVal "HKLM" ; used primarily for logging
    ${un.RegCleanMain} "Software\Mozilla"
    ${un.RegCleanUninstall}
    ${un.DeleteShortcuts}
    ${un.SetAppLSPCategories}
  ${EndIf}

  ${un.RegCleanAppHandler} "FirefoxURL-$AppUserModelID"
  ${un.RegCleanAppHandler} "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanProtocolHandler} "ftp"
  ${un.RegCleanProtocolHandler} "http"
  ${un.RegCleanProtocolHandler} "https"
  ${un.RegCleanFileHandler}  ".htm"   "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".html"  "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".shtml" "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".xht"   "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".xhtml" "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".oga"  "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".ogg"  "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".ogv"  "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".pdf"  "FirefoxHTML-$AppUserModelID"
  ${un.RegCleanFileHandler}  ".webm"  "FirefoxHTML-$AppUserModelID"

  SetShellVarContext all  ; Set SHCTX to HKLM
  ${un.GetSecondInstallPath} "Software\Mozilla" $R9
  ${If} $R9 == "false"
    SetShellVarContext current  ; Set SHCTX to HKCU
    ${un.GetSecondInstallPath} "Software\Mozilla" $R9
  ${EndIf}

  DeleteRegKey HKLM "Software\Clients\StartMenuInternet\${AppRegName}-$AppUserModelID"
  DeleteRegValue HKLM "Software\RegisteredApplications" "${AppRegName}-$AppUserModelID"

  DeleteRegKey HKCU "Software\Clients\StartMenuInternet\${AppRegName}-$AppUserModelID"
  DeleteRegValue HKCU "Software\RegisteredApplications" "${AppRegName}-$AppUserModelID"

  ; Remove old protocol handler and StartMenuInternet keys without install path
  ; hashes, but only if they're for this installation.
  ReadRegStr $0 HKLM "Software\Classes\FirefoxHTML\DefaultIcon" ""
  StrCpy $0 $0 -2
  ${If} $0 == "$INSTDIR\${FileMainEXE}"
    DeleteRegKey HKLM "Software\Classes\FirefoxHTML"
    DeleteRegKey HKLM "Software\Classes\FirefoxURL"
    ${StrFilter} "${FileMainEXE}" "+" "" "" $R9
    DeleteRegKey HKLM "Software\Clients\StartMenuInternet\$R9"
    DeleteRegValue HKLM "Software\RegisteredApplications" "$R9"
    DeleteRegValue HKLM "Software\RegisteredApplications" "${AppRegName}"
  ${EndIf}
  ReadRegStr $0 HKCU "Software\Classes\FirefoxHTML\DefaultIcon" ""
  StrCpy $0 $0 -2
  ${If} $0 == "$INSTDIR\${FileMainEXE}"
    DeleteRegKey HKCU "Software\Classes\FirefoxHTML"
    DeleteRegKey HKCU "Software\Classes\FirefoxURL"
    ${StrFilter} "${FileMainEXE}" "+" "" "" $R9
    DeleteRegKey HKCU "Software\Clients\StartMenuInternet\$R9"
    DeleteRegValue HKCU "Software\RegisteredApplications" "$R9"
    DeleteRegValue HKCU "Software\RegisteredApplications" "${AppRegName}"
  ${EndIf}

  StrCpy $0 "Software\Microsoft\Windows\CurrentVersion\App Paths\${FileMainEXE}"
  ${If} $R9 == "false"
    DeleteRegKey HKLM "$0"
    DeleteRegKey HKCU "$0"
    StrCpy $0 "Software\Microsoft\MediaPlayer\ShimInclusionList\${FileMainEXE}"
    DeleteRegKey HKLM "$0"
    DeleteRegKey HKCU "$0"
    StrCpy $0 "Software\Microsoft\MediaPlayer\ShimInclusionList\plugin-container.exe"
    DeleteRegKey HKLM "$0"
    DeleteRegKey HKCU "$0"
    StrCpy $0 "Software\Classes\MIME\Database\Content Type\application/x-xpinstall;app=firefox"
    DeleteRegKey HKLM "$0"
    DeleteRegKey HKCU "$0"
  ${Else}
    ReadRegStr $R1 HKLM "$0" ""
    ${un.RemoveQuotesFromPath} "$R1" $R1
    ${un.GetParent} "$R1" $R1
    ${If} "$INSTDIR" == "$R1"
      WriteRegStr HKLM "$0" "" "$R9"
      ${un.GetParent} "$R9" $R1
      WriteRegStr HKLM "$0" "Path" "$R1"
    ${EndIf}
  ${EndIf}

  ; Remove directories and files we always control before parsing the uninstall
  ; log so empty directories can be removed.
  ${If} ${FileExists} "$INSTDIR\updates"
    RmDir /r /REBOOTOK "$INSTDIR\updates"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\updated"
    RmDir /r /REBOOTOK "$INSTDIR\updated"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\defaults\shortcuts"
    RmDir /r /REBOOTOK "$INSTDIR\defaults\shortcuts"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\distribution"
    RmDir /r /REBOOTOK "$INSTDIR\distribution"
  ${EndIf}

  ; Remove files that may be left behind by the application in the
  ; VirtualStore directory.
  ${un.CleanVirtualStore}

  ; Only unregister the dll if the registration points to this installation
  ReadRegStr $R1 HKCR "CLSID\{0D68D6D0-D93D-4D08-A30D-F00DD1F45B24}\InProcServer32" ""
  ${If} "$INSTDIR\AccessibleMarshal.dll" == "$R1"
    ${UnregisterDLL} "$INSTDIR\AccessibleMarshal.dll"
  ${EndIf}

  ; Only unregister the dll if the registration points to this installation
  ReadRegStr $R1 HKCR "CLSID\${AccessibleHandlerCLSID}\InprocHandler32" ""
  ${If} "$INSTDIR\AccessibleHandler.dll" == "$R1"
    ${UnregisterDLL} "$INSTDIR\AccessibleHandler.dll"
  ${EndIf}

  ${un.RemovePrecompleteEntries} "false"

  ${If} ${FileExists} "$INSTDIR\defaults\pref\channel-prefs.js"
    Delete /REBOOTOK "$INSTDIR\defaults\pref\channel-prefs.js"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\defaults\pref"
    RmDir /REBOOTOK "$INSTDIR\defaults\pref"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\defaults"
    RmDir /REBOOTOK "$INSTDIR\defaults"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\uninstall"
    ; Remove the uninstall directory that we control
    RmDir /r /REBOOTOK "$INSTDIR\uninstall"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\install.log"
    Delete /REBOOTOK "$INSTDIR\install.log"
  ${EndIf}
  ${If} ${FileExists} "$INSTDIR\update-settings.ini"
    Delete /REBOOTOK "$INSTDIR\update-settings.ini"
  ${EndIf}

  ; Explicitly remove empty webapprt dir in case it exists (bug 757978).
  RmDir "$INSTDIR\webapprt\components"
  RmDir "$INSTDIR\webapprt"

  ; Remove the installation directory if it is empty
  RmDir "$INSTDIR"

  ; If firefox.exe was successfully deleted yet we still need to restart to
  ; remove other files create a dummy firefox.exe.moz-delete to prevent the
  ; installer from allowing an install without restart when it is required
  ; to complete an uninstall.
  ${If} ${RebootFlag}
    ; Admin is required to delete files on reboot so only add the moz-delete if
    ; the user is an admin. After calling UAC::IsAdmin $0 will equal 1 if the
    ; user is an admin.
    UAC::IsAdmin
    ${If} "$0" == "1"
      ${Unless} ${FileExists} "$INSTDIR\${FileMainEXE}.moz-delete"
        FileOpen $0 "$INSTDIR\${FileMainEXE}.moz-delete" w
        FileWrite $0 "Will be deleted on restart"
        Delete /REBOOTOK "$INSTDIR\${FileMainEXE}.moz-delete"
        FileClose $0
      ${EndUnless}
    ${EndIf}
  ${EndIf}

  ; Refresh desktop icons otherwise the start menu internet item won't be
  ; removed and other ugly things will happen like recreation of the app's
  ; clients registry key by the OS under some conditions.
  System::Call "shell32::SHChangeNotify(i ${SHCNE_ASSOCCHANGED}, i 0, i 0, i 0)"

  ; Users who uninstall then reinstall expecting Firefox to use a clean profile
  ; may be surprised during first-run. This key is checked during startup of Firefox and
  ; subsequently deleted after checking. If the value is found during startup
  ; the browser will offer to Reset Firefox. We use the UpdateChannel to match
  ; uninstalls of Firefox-release with reinstalls of Firefox-release, for example.
  WriteRegStr HKCU "Software\Mozilla\Firefox" "Uninstalled-${UpdateChannel}" "True"

!ifdef MOZ_MAINTENANCE_SERVICE
  ; Get the path the allowed cert is at and remove it
  ; Keep this block of code last since it modfies the reg view
  ServicesHelper::PathToUniqueRegistryPath "$INSTDIR"
  Pop $MaintCertKey
  ${If} $MaintCertKey != ""
    ; Always use the 64bit registry for certs on 64bit systems.
    ${If} ${RunningX64}
      SetRegView 64
    ${EndIf}
    DeleteRegKey HKLM "$MaintCertKey"
    ${If} ${RunningX64}
      SetRegView lastused
    ${EndIf}
  ${EndIf}
  Call un.UninstallServiceIfNotUsed
!endif

  ${un.IsFirewallSvcRunning}
  Pop $0
  ${If} "$0" == "true"
    liteFirewallW::RemoveRule "$INSTDIR\${FileMainEXE}" "${BrandShortName} ($INSTDIR)"
  ${EndIf}
SectionEnd

################################################################################
# Language

!insertmacro MOZ_MUI_LANGUAGE 'baseLocale'
!verbose push
!verbose 3
!include "overrideLocale.nsh"
!include "customLocale.nsh"
!verbose pop

; Set this after the locale files to override it if it is in the locale. Using
; " " for BrandingText will hide the "Nullsoft Install System..." branding.
BrandingText " "

################################################################################
# Page pre, show, and leave functions

Function un.preWelcome
  ${If} ${FileExists} "$INSTDIR\distribution\modern-wizard.bmp"
    Delete "$PLUGINSDIR\modern-wizard.bmp"
    CopyFiles /SILENT "$INSTDIR\distribution\modern-wizard.bmp" "$PLUGINSDIR\modern-wizard.bmp"
  ${EndIf}
FunctionEnd

Function un.leaveWelcome
  ${If} ${FileExists} "$INSTDIR\${FileMainEXE}"
    Banner::show /NOUNLOAD "$(BANNER_CHECK_EXISTING)"

    ; If the message window has been found previously give the app an additional
    ; five seconds to close.
    ${If} "$TmpVal" == "FoundMessageWindow"
      Sleep 5000
    ${EndIf}

    ${PushFilesToCheck}

    ${un.CheckForFilesInUse} $TmpVal

    Banner::destroy

    ; If there are files in use $TmpVal will be "true"
    ${If} "$TmpVal" == "true"
      ; If the message window is found the call to ManualCloseAppPrompt will
      ; abort leaving the value of $TmpVal set to "FoundMessageWindow".
      StrCpy $TmpVal "FoundMessageWindow"
      ${un.ManualCloseAppPrompt} "${WindowClass}" "$(WARN_MANUALLY_CLOSE_APP_UNINSTALL)"
      ; If the message window is not found set $TmpVal to "true" so the restart
      ; required message is displayed.
      StrCpy $TmpVal "true"
    ${EndIf}
  ${EndIf}
FunctionEnd

Function un.preConfirm
  ${If} ${FileExists} "$INSTDIR\distribution\modern-header.bmp"
  ${AndIf} $hHeaderBitmap == ""
    Delete "$PLUGINSDIR\modern-header.bmp"
    CopyFiles /SILENT "$INSTDIR\distribution\modern-header.bmp" "$PLUGINSDIR\modern-header.bmp"
    ${un.ChangeMUIHeaderImage} "$PLUGINSDIR\modern-header.bmp"
  ${EndIf}

  ; Setup the unconfirm.ini file for the Custom Uninstall Confirm Page
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Settings" NumFields "3"

  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Type   "label"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Text   "$(UN_CONFIRM_UNINSTALLED_FROM)"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Left   "0"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Right  "-1"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Top    "5"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Bottom "15"

  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Type   "text"
  ; The contents of this control must be set as follows in the pre function
  ; ${MUI_INSTALLOPTIONS_READ} $1 "unconfirm.ini" "Field 2" "HWND"
  ; SendMessage $1 ${WM_SETTEXT} 0 "STR:$INSTDIR"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" State  ""
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Left   "0"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Right  "-1"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Top    "17"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Bottom "30"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" flags  "READONLY"

  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Type   "label"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Text   "$(UN_CONFIRM_CLICK)"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Left   "0"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Right  "-1"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Top    "130"
  WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Bottom "150"

  ${If} "$TmpVal" == "true"
    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Type   "label"
    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Text   "$(SUMMARY_REBOOT_REQUIRED_UNINSTALL)"
    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Left   "0"
    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Right  "-1"
    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Top    "35"
    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Bottom "45"

    WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Settings" NumFields "4"
  ${EndIf}

  !insertmacro MUI_HEADER_TEXT "$(UN_CONFIRM_PAGE_TITLE)" "$(UN_CONFIRM_PAGE_SUBTITLE)"
  ; The Summary custom page has a textbox that will automatically receive
  ; focus. This sets the focus to the Install button instead.
  !insertmacro MUI_INSTALLOPTIONS_INITDIALOG "unconfirm.ini"
  GetDlgItem $0 $HWNDPARENT 1
  System::Call "user32::SetFocus(i r0, i 0x0007, i,i)i"
  ${MUI_INSTALLOPTIONS_READ} $1 "unconfirm.ini" "Field 2" "HWND"
  SendMessage $1 ${WM_SETTEXT} 0 "STR:$INSTDIR"
  !insertmacro MUI_INSTALLOPTIONS_SHOW
FunctionEnd

Function un.preFinish
  ; Need to give the survey (readme) checkbox a few extra DU's of height
  ; to accommodate a potentially multi-line label. If the reboot flag is set,
  ; then we're not showing the survey checkbox and Field 4 is the "reboot now"
  ; radio button; setting it to go from 90 to 120 (instead of 90 to 100) would
  ; cover up Field 5 which is "reboot later", running from 110 to 120. For
  ; whatever reason child windows get created at the bottom of the z-order, so
  ; 4 overlaps 5.
  ${IfNot} ${RebootFlag}
    WriteINIStr "$PLUGINSDIR\ioSpecial.ini" "Field 4" Bottom "120"
  ${EndIf}
FunctionEnd

################################################################################
# Initialization Functions

Function .onInit
  ; Remove the current exe directory from the search order.
  ; This only effects LoadLibrary calls and not implicitly loaded DLLs.
  System::Call 'kernel32::SetDllDirectoryW(w "")'

  ; We need this set up for most of the helper.exe operations.
  ${UninstallOnInitCommon}
FunctionEnd

Function un.onInit
  ; Remove the current exe directory from the search order.
  ; This only effects LoadLibrary calls and not implicitly loaded DLLs.
  System::Call 'kernel32::SetDllDirectoryW(w "")'

  StrCpy $LANGUAGE 0
  StrCpy $ShouldOpenSurvey "0"

  ${un.UninstallUnOnInitCommon}

  !insertmacro InitInstallOptionsFile "unconfirm.ini"
FunctionEnd

Function .onGUIEnd
  ${OnEndCommon}
FunctionEnd

Function un.onGUIEnd
  ${un.OnEndCommon}

  ${If} $ShouldOpenSurvey == "1"
    ; Though these values are sometimes incorrect due to bug 444664 it happens
    ; so rarely it isn't worth working around it by reading the registry values.
    ${WinVerGetMajor} $0
    ${WinVerGetMinor} $1
    ${WinVerGetBuild} $2
    ${WinVerGetServicePackLevel} $3
    StrCpy $R1 "${URLUninstallSurvey}$0.$1.$2.$3"

    ; We can't just open the URL normally because we are most likely running
    ; elevated without an unelevated process to redirect through, and we're
    ; not going to go around starting elevated web browsers. But to start an
    ; unelevated process directly from here we need a pretty nasty hack; see
    ; the ExecInExplorer plugin code itself for the details.
    ; If we were the default browser and we've now been uninstalled, we need
    ; to take steps to make sure the user doesn't see an "open with" dialog;
    ; they're helping us out by answering this survey, they don't need more
    ; friction. Sometimes Windows 7 and 8 automatically switch the default to
    ; IE, but it isn't reliable, so we'll manually invoke IE in that case.
    ; Windows 10 always seems to just clear the default browser, so for it
    ; we'll manually invoke Edge using Edge's custom URI scheme.
    ${If} ${AtLeastWin10}
      ExecInExplorer::Exec "microsoft-edge:$R1"
    ${Else}
      ExecInExplorer::Exec "iexplore.exe" /cmdargs "$R1"
    ${EndIf}
  ${EndIf}
FunctionEnd