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| {{PageAuthor|Afrow UK}}
| | http://www.message_viacmo.com/ |
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| == Description ==
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| This script will check a string (or directory path) for spaces and returns the number of spaces found in the string.
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| Updated 12th January 2005
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| == Usage ==
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| The CheckForSpaces function should be called in the Leave function of the Directory page. Below are the two ways to implement this (through Classic UI and Modern UI). Both implement a function called "DirectoryLeave" as the Directory pages' Leave function.
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| === MUI ===
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| Use this if you are using Modern UI (<i>!include MUI.nsh</i>).
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| <highlight-nsis>
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| !define MUI_PAGE_CUSTOMFUNCTION_LEAVE "DirectoryLeave"
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| !insertmacro MUI_PAGE_DIRECTORY
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| </highlight-nsis>
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| === Non-MUI ===
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| Use this if you aren't using Modern UI.
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| <highlight-nsis>
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| Page Directory "" "" "DirectoryLeave"
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| </highlight-nsis>
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| === DirectoryLeave Function ===
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| This gives an example of what your "DirectoryLeave" function should look like.
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| <highlight-nsis>
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| Function DirectoryLeave
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| # Call the CheckForSpaces function.
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| Push $INSTDIR # Input string (install path).
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| Call CheckForSpaces
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| Pop $R0 # The function returns the number of spaces found in the input string.
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| # Check if any spaces exist in $INSTDIR.
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| StrCmp $R0 0 NoSpaces
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| # Plural if more than 1 space in $INSTDIR.
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| StrCmp $R0 1 0 +3
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| StrCpy $R1 ""
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| Goto +2
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| StrCpy $R1 "s"
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| # Show message box then take the user back to the Directory page.
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| MessageBox MB_OK|MB_ICONEXCLAMATION "Error: The Installaton directory \
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| has $R0 space$R1.$\nPlease remove the space$R1."
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| Abort
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| NoSpaces:
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| FunctionEnd
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| </highlight-nsis>
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| == The Function ==
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| <highlight-nsis>
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| Function CheckForSpaces
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| Exch $R0
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| Push $R1
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| Push $R2
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| Push $R3
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| StrCpy $R1 -1
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| StrCpy $R3 $R0
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| StrCpy $R0 0
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| loop:
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| StrCpy $R2 $R3 1 $R1
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| IntOp $R1 $R1 - 1
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| StrCmp $R2 "" done
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| StrCmp $R2 " " 0 loop
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| IntOp $R0 $R0 + 1
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| Goto loop
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| done:
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| Pop $R3
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| Pop $R2
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| Pop $R1
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| Exch $R0
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| FunctionEnd
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| </highlight-nsis>
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| -Stu
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| [[Category:Disk, Path & File Functions]]
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