         symbol.setAttribute 'viewBox', "0 0 #{width} #{height}"
         symbol.appendChild node
       use.setAttribute 'xlink:href', '#' + inlineImages[attributes]
-      keyBase = "$image$#{filename}"
       false
     ## Lay out the symbols in the drawing via SVG <use>.
     viewBox = [0, 0, 0, 0]  ## initially x-min, y-min, x-max, y-max


escapeId = (key) ->
  ###
  id/href follows the IRI spec [https://tools.ietf.org/html/rfc3987]:
    ifragment      = *( ipchar / "/" / "?" )
    ipchar         = iunreserved / pct-encoded / sub-delims / ":" / "@"
    iunreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~" / ucschar
    pct-encoded    = "%" HEXDIG HEXDIG
    sub-delims     = "!" / "$" / "&" / "'" / "(" / ")"
                   / "*" / "+" / "," / ";" / "="
    ucschar        = %xA0-D7FF / %xF900-FDCF / #%xFDF0-FFEF
                   / %x10000-1FFFD / %x20000-2FFFD / %x30000-3FFFD
                   / %x40000-4FFFD / %x50000-5FFFD / %x60000-6FFFD
                   / %x70000-7FFFD / %x80000-8FFFD / %x90000-9FFFD
                   / %xA0000-AFFFD / %xB0000-BFFFD / %xC0000-CFFFD
                   / %xD0000-DFFFD / %xE1000-EFFFD
  We also want to escape colon (:) which seems to cause trouble.
  We use encodeURIComponent which escapes everything except
    A-Z a-z 0-9 - _ . ! ~ * ' ( )
  [https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent]
  Unfortunately, Inkscape seems to ignore any %-encoded symbols; see
  https://bugs.launchpad.net/inkscape/+bug/1737778
  So we replace '%' with '$', an allowed character that's already escaped.
  In the special case of a blank key, we use the special $BLANK$ which cannot
  be generated by the escaping process.
  ###
  (encodeURIComponent key
   .replace /%/g, '$'
  ) or '$BLANK$'

zeroSizeReplacement = 1


      if attributes not of inlineImages
        inlineImageVersions[filename] ?= 0
        version = inlineImageVersions[filename]++
        inlineImages[attributes] = ":image:#{escapeId filename}:v#{version}"
        svg.appendChild symbol = doc.createElementNS SVGNS, 'symbol'
        symbol.setAttribute 'id', inlineImages[attributes]
        # If we don't have width/height set from data-width/height fields,
