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| local p = {}
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| function p.main(frame)
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| local f = frame["args"][1]
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| -- Strip whitespace at beginning and end of input
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| f = string.gsub(f,"^%s*(.-)%s*$","%1")
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| -- Remove namespace prefix
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| f = string.gsub(f,"^[Ff][Ii][Ll][Ee]:(.*)$","%1")
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| f = string.gsub(f,"^[Ii][Mm][Aa][Gg][Ee]:(.*)$","%1")
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| -- Remove any recognized extension
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| local e = string.lower(string.gsub(f,"^.*%.([^%.]*)$","%1"))
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| local map = {svg=1, png=1, jpg=1, jpeg=1, gif=1, tif=1, tiff=1, xcf=1, mid=1, ogg=1, ogv=1, djvu=1, oga=1, flac=1, wav=1, webm=1, pdf=1}
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| if map[e]
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| then n = string.gsub(f,"^(.*)%.[^%.]*$","%1")
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| else n = f
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| end
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| return n
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| end
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|
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| function p.svg(frame)
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| local f = frame["args"][1]
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| -- Strip whitespace at beginning and end of input
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| f = string.gsub(f,"^%s*(.-)%s*$","%1")
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| -- Remove namespace prefix
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| f = string.gsub(f,"^[Ff][Ii][Ll][Ee]:(.*)$","%1")
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| f = string.gsub(f,"^[Ii][Mm][Aa][Gg][Ee]:(.*)$","%1")
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| -- Replace underscores with spaces
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| f = string.gsub(f,"_"," ")
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| -- Keep, replace with, or add "svg" extension
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| local e = string.lower(string.gsub(f,"^.*%.([^%.]*)$","%1"))
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| local map = {png=1, jpg=1, jpeg=1, gif=1, tif=1, tiff=1, xcf=1, mid=1, ogg=1, ogv=1, djvu=1, oga=1, flac=1, wav=1, webm=1, pdf=1}
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| if e=="svg"
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| then n = f
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| elseif map[e]
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| then n = string.gsub(f,"^(.*)%.[^%.]*$","%1.svg")
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| else n = f..".svg"
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| end
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| return n
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| end
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| return p
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