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% replace the global parts
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"_OriginalDocRoot_" __OriginalDocRoot_ replall
"_PrimaryName_" __PrimaryName_ replall
"_SourceWidth_" __SourceWidth_ replall
"_TargetWidth_" __ButtonWidth_ __ButtonCount_ mul replall
"_SourceHeight_" __SourceHeight_ replall
"_TargetHeight_" __ButtonHeight_ __ButtonCount_ mul  replall

"_Pwidth_" __ButtonWidth_ 4 sub replall
"_Pheight_" __ButtonHeight_ 4 sub replall
"_ButtonWinset_" __ButtonWidth_ 1 sub replall
"_ButtonHinset_" __ButtonHeight_ 1 sub replall

"_ButtonCount_" __ButtonCount_ replall
 "_SourceLeft_" __SourceLeft_ replall
 "_SourceTop_" __SourceTop_ replall
 "_ButtonHeight_" __ButtonHeight_ replall
 "_ButtonWidth_" __ButtonWidth_ replall
 "_BaseDocName_" __BaseDocName_ jpg replall

"[[" slice "]]" slice
empty
%
% stack: pre-prin-gen prin-gen post-prin-gen builder
%
__ButtonCount_ countup
{
 !_prin_
 third
 "_prin_" __PrimaryName_ &__prin_ replall
 "_ButtonHeight_" __ButtonHeight_ replall
 "_ButtonWidth_" __ButtonWidth_ replall
 "_prinf_"
 ".jpg"
 __TargetDocName_ __prin_ ^"_" & ^
 replall

 "_prinhref_"
 __PrimaryName_ &__prin_ html
 replall

 "_prinx_"
 __prin_ - __ButtonWidth_ mul
 replall

 "_priny_"
 __prin_ - __ButtonHeight_ mul
 replall

 &
} for

%
% stack: pre-prin-gen prin-gen post-prin-gen builder
%
pop3rd
^ &
%
% stack: builder
%