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47 lines
1.2 KiB
CoffeeScript
47 lines
1.2 KiB
CoffeeScript
###
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PDFReference - represents a reference to another object in the PDF object heirarchy
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By Devon Govett
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###
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zlib = require 'zlib'
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class PDFReference
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constructor: (@id, @data) ->
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@gen = 0
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@stream = null
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@finalizedStream = null
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object: ->
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out = ["#{@id} #{@gen} obj"]
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out.push PDFObject.convert(@data)
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if @stream
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@finalize() if not @finalizedStream
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out.push "stream"
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out.push @finalizedStream
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out.push "endstream"
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out.push "endobj"
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return out.join '\n'
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add: (s) ->
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@stream ?= []
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@stream.push if Buffer.isBuffer(s) then s.toString('binary') else s
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finalize: (compress = false) ->
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# cache the finalized stream
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if @stream
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data = @stream.join '\n'
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if compress
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compressedData = zlib.deflate new Buffer(data)
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@finalizedStream = compressedData.toString 'binary'
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else
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@finalizedStream = data
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else
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@finalizedStream = ''
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toString: ->
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"#{@id} #{@gen} R"
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module.exports = PDFReference
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PDFObject = require './object' |