BannerTrimPath

Author: Instructor (talk, contrib)

Page for NSIS 2.07 and below users

You can use the latest version of headers (recommended) or the following function code (put the function code in your script before calling it)

Function Description

____________________________________________________________________________
 
                            BannerTrimPath
____________________________________________________________________________
 
 
Trim string path for banner.
 
 
Syntax:
${BannerTrimPath} "[PathString]" "[Option]" $var
 
"[PathString]"    ;
                  ;
"[Option]"        ; [Length][A|B|C|D]
                  ;
                  ; Length  -Maximum string length
                  ;   A     -Trim center path (default)
                  ;           (C:\root\...\third path) 
                  ;           If A mode not possible Then will be used B mode
                  ;   B     -Trim right path
                  ;           (C:\root\second path\...)
                  ;           If B mode not possible Then will be used C mode
                  ;   C     -Trim right string
                  ;           (C:\root\second path\third p...)
                  ;   D     -Trim right string + filename
                  ;           (C:\root\second p...\third path)
                  ;           If D mode not possible Then will be used C mode
                  ;
$var              ; Result:  Trimmed path

Example:

Section
	${BannerTrimPath} "C:\Server\Documents\Terminal\license.htm" "34A" $R0
	;$R0=C:\Server\...\Terminal\license.htm
SectionEnd

Example (Banner plugin):

!include "WinMessages.nsh"
!include "FileFunc.nsh"
!insertmacro Locate
 
Section
	Banner::show /NOUNLOAD "Starting..."
	Banner::getWindow /NOUNLOAD
	Pop $R1
	${Locate} "$WINDIR" "/L=F /M=*.* /B=1" "LocateCallback"
	Banner::destroy
SectionEnd
 
Function LocateCallback
	StrCmp $R0 $R8 code
	StrCpy $R0 $R8
	${BannerTrimPath} "$R8" "38B" $R8
	GetDlgItem $1 $R1 1030
	SendMessage $1 ${WM_SETTEXT} 0 "STR:$R8"
 
	code:
	StrCmp $R9 '' end
	;...
 
	end:
	Push $0
FunctionEnd

Example (nxs plugin):

!include "FileFunc.nsh"
!insertmacro Locate
 
Section
	nxs::Show /NOUNLOAD `$(^Name) Setup`\
	  /top `Setup searching something$\nPlease wait$\nIf you can...`\
	  /h 1 /can 1 /end
	${Locate} "$WINDIR" "/L=F /M=*.* /B=1" "LocateCallback"
	nxs::Destroy
SectionEnd
 
Function LocateCallback
	StrCmp $R0 $R8 abortcheck
	StrCpy $R0 $R8
	${BannerTrimPath} "$R8" "55A" $R8
	nxs::Update /NOUNLOAD /sub "$R8" /pos 78 /end
 
	abortcheck:
	nxs::HasUserAborted /NOUNLOAD
	Pop $0
	StrCmp $0 1 0 +2
	StrCpy $0 StopLocate
 
	StrCmp $R9 '' end
	;...
 
	end:
	Push $0
FunctionEnd

Function Code

Function BannerTrimPath
	!define BannerTrimPath `!insertmacro BannerTrimPathCall`
 
	!macro BannerTrimPathCall _PATH _LENGTH _RESULT
		Push `${_PATH}`
		Push `${_LENGTH}`
		Call BannerTrimPath
		Pop ${_RESULT}
	!macroend
 
	Exch $1
	Exch
	Exch $0
	Exch
	Push $2
	Push $3
	Push $4
 
	StrCpy $3 $1 1 -1
	IntOp $1 $1 + 0
	StrLen $2 $0
	IntCmp $2 $1 end end
	IntOp $1 $1 - 3
	IntCmp $1 0 empty empty
	StrCmp $3 'A' A-trim
	StrCmp $3 'B' B-trim
	StrCmp $3 'C' C-trim
	StrCmp $3 'D' D-trim
 
	A-trim:
	StrCpy $3 $0 1 1
	StrCpy $2 0
	StrCmp $3 ':' 0 +2
	IntOp $2 $2 + 2
 
	loopleft:
	IntOp $2 $2 + 1
	StrCpy $3 $0 1 $2
	StrCmp $2 $1 C-trim
	StrCmp $3 '\' 0 loopleft
	StrCpy $3 $0 $2
	IntOp $2 $2 - $1
	IntCmp $2 0 B-trim 0 B-trim
 
	loopright:
	IntOp $2 $2 + 1
	StrCpy $4 $0 1 $2
	StrCmp $2 0 B-trim
	StrCmp $4 '\' 0 loopright
	StrCpy $4 $0 '' $2
	StrCpy $0 '$3\...$4'
	goto end
 
	B-trim:
	StrCpy $2 $1
	IntOp $2 $2 - 1
	StrCmp $2 -1 C-trim
	StrCpy $3 $0 1 $2
	StrCmp $3 '\' 0 -3
	StrCpy $0 $0 $2
	StrCpy $0 '$0\...'
	goto end
 
	C-trim:
	StrCpy $0 $0 $1
	StrCpy $0 '$0...'
	goto end
 
	D-trim:
	StrCpy $3 -1
	IntOp $3 $3 - 1
	StrCmp $3 -$2 C-trim
	StrCpy $4 $0 1 $3
	StrCmp $4 '\' 0 -3
	StrCpy $4 $0 '' $3
	IntOp $3 $1 + $3
	IntCmp $3 2 C-trim C-trim
	StrCpy $0 $0 $3
	StrCpy $0 '$0...$4'
	goto end
 
	empty:
	StrCpy $0 ''
 
	end:
	Pop $4
	Pop $3
	Pop $2
	Pop $1
	Exch $0
FunctionEnd