class Rote::Filters::Eval
Page
filter that evaluates Ruby code in it's body in the current interpreter. The code is directly evaluated, and anything it writes to standard out becomes the macro replacement.
Obviously you can place Ruby code directly in your pages, using ERB, and for many cases that is the route you should take. There is a (somewhat) subtle difference between the to alternatives however: ERB is always evaluated right at the start of rendering, before any Text Filters
are run, whereas #:eval# code is executed during the page filter stage, which happens after ERB and text filtering, but before layout is applied.
Public Class Methods
new(macro_re = MACRO_RE)
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Calls superclass method
Rote::Filters::MacroFilter::new
# File lib/rote/filters/eval.rb 31 def initialize(macro_re = MACRO_RE) 32 super([],macro_re) 33 end
Public Instance Methods
macro_eval(cmd,body,raw)
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# File lib/rote/filters/eval.rb 35 def macro_eval(cmd,body,raw) 36 # no need to fiddle with $SAFE here is there? 37 38 # FIXME this is a hack. 39 40 # Utility is still limited I guess, since current Page isn't 41 # readily available to the macro code. We can probably fix 42 # that though. 43 44 # If thread safety becomes an issue, this'll probably need 45 # to be critical sectioned. 46 47 begin 48 oldsio, $stdout = $stdout, StringIO.new 49 eval body 50 $stdout.rewind 51 $stdout.read 52 ensure 53 $stdout = oldsio 54 end 55 end