/*

external.nsh

Installation of external components: MiKTeX, ImageMagick, Ghostscript
Either an existing installation can be used or a the components can be
downloaded or installed (depending on the type of installer)

*/

#Var ExternalPage
#Var ExternalPage.Info
#Var ExternalPage.Setup
#Var ExternalPage.Existing
#Var ExternalPage.Folder
#Var ExternalPage.Folder.Text
#Var ExternalPage.Folder.Return
#Var ExternalPage.FolderBrowse
#Var ExternalPage.FolderInfo
#Var ExternalPage.NoInstall

#Var ExternalPage.RadioButton.Click
#Var ExternalPage.FolderBrowse.Click

#Var LaTeXState
#Var LaTeXSetup.State
#Var LaTeXExisting.State
#Var LaTeXNoInstall.State

#Var ControlState
#Var ComponentSize

!macro EXTERNAL_SHOWDIALOG COMPONENT

  # Build the dialog

  !insertmacro MUI_HEADER_TEXT $(TEXT_EXTERNAL_${COMPONENT}_TITLE) $(TEXT_EXTERNAL_${COMPONENT}_SUBTITLE)
  
#  GetFunctionAddress $ExternalPage.RadioButton.Click ExternalRadioButtonClick
#  GetFunctionAddress $ExternalPage.FolderBrowse.Click ExternalFolderBrowseClick

  nsDialogs::Create /NOUNLOAD 1018
  Pop $ExternalPage

  !ifdef BUNDLESETUP_${COMPONENT}
    ${NSD_CreateLabel} 0u 0u 300u 20u $(TEXT_EXTERNAL_${COMPONENT}_INFO_INSTALL)
  !else
    ${NSD_CreateLabel} 0u 0u 300u 20u $(TEXT_EXTERNAL_${COMPONENT}_INFO_DOWNLOAD)
  !endif
  Pop $ExternalPage.Info

  !ifdef BUNDLESETUP_${COMPONENT}
    ${NSD_CreateRadioButton} 0u 40u 300u 10u $(TEXT_EXTERNAL_${COMPONENT}_INSTALL)
  !else
    ${NSD_CreateRadioButton} 0u 40u 300u 10u $(TEXT_EXTERNAL_${COMPONENT}_DOWNLOAD)
  !endif
  Pop $ExternalPage.Setup
  nsDialogs::OnClick /NOUNLOAD $ExternalPage.Setup $ExternalPage.RadioButton.Click
  
  ${NSD_CreateRadioButton} 0u 60u 300u 10u $(TEXT_EXTERNAL_${COMPONENT}_FOLDER)
  Pop $ExternalPage.Existing
  nsDialogs::OnClick /NOUNLOAD $ExternalPage.Existing $ExternalPage.RadioButton.Click
  
  ${NSD_CreateText} 10u 80u 255u 12u $Path${COMPONENT}
  Pop $ExternalPage.Folder
 
  ${NSD_CreateBrowseButton} 270u 80u 20u 12u ...
  Pop $ExternalPage.FolderBrowse
  nsDialogs::OnClick /NOUNLOAD $ExternalPage.FolderBrowse $ExternalPage.FolderBrowse.Click
  
  ${NSD_CreateLabel} 10u 100u 290u 10u $(TEXT_EXTERNAL_${COMPONENT}_FOLDER_INFO)
  Pop $ExternalPage.FolderInfo
  
  ${NSD_CreateRadioButton} 0u 120u 300u 10u $(TEXT_EXTERNAL_${COMPONENT}_NONE)
  Pop $ExternalPage.NoInstall
  nsDialogs::OnClick /NOUNLOAD $ExternalPage.NoInstall $ExternalPage.RadioButton.Click
   
  # Set the state of the controls to the previous user selection (or the default)

  ${If} $${COMPONENT}State == ""
    # Page is displayed for the first time, set the default
    ${If} $Path${COMPONENT} == ""
      !if ${COMPONENT} != LaTeX
      # ImageMagick and Ghostscript require Administrator or
      # power user privileges for installation
      # Setup won't be checked because it's disabled
      ${If} $MultiUser.Privileges != "User"
      ${AndIf} $MultiUser.Privileges != "Guest"
      !endif 
      
      ${NSD_SetState} $ExternalPage.Setup ${BST_CHECKED}
      
      !if ${COMPONENT} != LaTeX
      ${Else}
        ${NSD_SetState} $ExternalPage.NoInstall ${BST_CHECKED}
      ${EndIf}
      !endif
    ${Else}
      ${NSD_SetState} $ExternalPage.Existing ${BST_CHECKED}
    ${EndIf}
  ${Else} 
    ${NSD_SetState} $ExternalPage.Setup $${COMPONENT}Setup.State
    ${NSD_SetState} $ExternalPage.Existing $${COMPONENT}Existing.State
    ${NSD_SetState} $ExternalPage.NoInstall $${COMPONENT}NoInstall.State
  ${EndIf}
  
  #Call ExternalRadioButtonClick
  
  nsDialogs::Show

!macroend

!macro EXTERNAL_VALIDATEDIALOG COMPONENT

  # Save state of controls
  StrCpy $${COMPONENT}State saved
  ${NSD_GetState} $ExternalPage.Setup $${COMPONENT}Setup.State
  ${NSD_GetState} $ExternalPage.Setup $${COMPONENT}Setup.State
  ${NSD_GetState} $ExternalPage.Existing $${COMPONENT}Existing.State
  ${NSD_GetState} $ExternalPage.NoInstall $${COMPONENT}NoInstall.State
  
  ${If} $${COMPONENT}Setup.State = ${BST_CHECKED}
    
    StrCpy $Setup${COMPONENT} ${TRUE}
    
    # Download or install, so we need hard drive space
    
    # Add size of component installer
    StrCpy $ComponentSize $Size${COMPONENT}
    
    ${If} $Path${COMPONENT} == ""
      # Not yet installed, add size of component itself
      IntOp $ComponentSize $ComponentSize + ${SIZE_${COMPONENT}}
    ${EndIf}
    
    SectionSetSize ${External${COMPONENT}} $ComponentSize
    
  ${Else}
    
    # No setup
    
    StrCpy $Setup${COMPONENT} ${FALSE}
    SectionSetSize ${External${COMPONENT}} 0
  
  ${EndIf}
  
  ${If} $${COMPONENT}Existing.State = ${BST_CHECKED}
  
    # Update location of component
    
    ${NSD_GetText} $ExternalPage.Folder $ExternalPage.Folder.Text
    
    # Verify whether the path exists
    
    ${IfNot} ${FileExists} "$ExternalPage.Folder.Text\${BIN_${COMPONENT}}"
      MessageBox MB_OK|MB_ICONEXCLAMATION $(TEXT_EXTERNAL_${COMPONENT}_NOTFOUND)
      Abort # Return to allow the user to correct the location
    ${EndIf}
    
    StrCpy $Path${COMPONENT} $ExternalPage.Folder.Text
  
  ${EndIf}
  
!macroend

#Function ExternalRadioButtonClick

  # Enable the folder selection controls depending
  # if the option to use an existing installation is selected

#  ${NSD_GetState} $ExternalPage.Existing $ControlState
  
#  ${If} $ControlState = ${BST_CHECKED}
#    EnableWindow $ExternalPage.Folder 1
#    EnableWindow $ExternalPage.FolderBrowse 1
#    EnableWindow $ExternalPage.FolderInfo 1
#  ${Else}
#    EnableWindow $ExternalPage.Folder 0
#    EnableWindow $ExternalPage.FolderBrowse 0
#    EnableWindow $ExternalPage.FolderInfo 0
#  ${EndIf}

#FunctionEnd

#Function ExternalFolderBrowseClick

  # Browse button clicked
  
  # Get current folder to set as default
#  ${NSD_GetText} $ExternalPage.Folder $ExternalPage.Folder.Text
  
  # Browse for new folder
#  nsDialogs::SelectFolderDialog /NOUNLOAD "" $ExternalPage.Folder.Text
#  Pop $ExternalPage.Folder.Return
  
#  ${If} $ExternalPage.Folder.Return != error
#    StrCpy $ExternalPage.Folder.Text $ExternalPage.Folder.Return
#  ${EndIf}
  
#  ${NSD_SetText} $ExternalPage.Folder $ExternalPage.Folder.Text

#FunctionEnd

# Page functions

#Function PageExternalLaTeX
#  !insertmacro EXTERNAL_SHOWDIALOG LaTeX
#FunctionEnd

#Function PageExternalLaTeXValidate
#  !insertmacro EXTERNAL_VALIDATEDIALOG LaTeX
#FunctionEnd