Class: RGhost::Engine

Inherits:
Object
  • Object
show all
Includes:
Constants::Devices
Defined in:
lib/rghost/ruby_ghost_engine.rb

Constant Summary collapse

DEFAULT_OPTIONS = 
{:device => :pdf }

Constants included from Constants::Devices

Constants::Devices::DEVICES_ALIAS, Constants::Devices::STANDARD

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Constants::Devices

#device_for

Constructor Details

#initialize(document, options = {}) ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/rghost/ruby_ghost_engine.rb', line 10

def initialize(document,options={})
  @document=document
  @options=DEFAULT_OPTIONS.merge(options)
  @errors=[]
  @error=false
  @output=nil
  @delete_input=true

end

Instance Attribute Details

#error ⇒ Object (readonly)

Returns the value of attribute error.



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# File 'lib/rghost/ruby_ghost_engine.rb', line 5

def error
  @error
end

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/rghost/ruby_ghost_engine.rb', line 5

def errors
  @errors
end

#output ⇒ Object (readonly)

Returns the value of attribute output.



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# File 'lib/rghost/ruby_ghost_engine.rb', line 5

def output
  @output
end

Instance Method Details

#clear_output ⇒ Object 



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# File 'lib/rghost/ruby_ghost_engine.rb', line 106

def clear_output
  case @output
  when File
      @output.close
    File.delete(@output.path)
  when Array
      @output.each do |f|
      f.close
      File.delete(f.path)
    end
  end
end

#error? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rghost/ruby_ghost_engine.rb', line 118

def error?
  @error
end

#render(device = nil) ⇒ Object 



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# File 'lib/rghost/ruby_ghost_engine.rb', line 21

def render(device=nil)

  device||=@options[:device]
  tmp_filename=@options[:filename]
  unless tmp_filename
    tmp_filename||= File.join(RGhost::Config::GS[:tmpdir], "#{self.object_id.abs}-#{rand(999999)}-#{Time.now.to_i}")
    file_out="#{tmp_filename}.#{device}"
  else
    file_out=tmp_filename
  end
  external_encoding = RGhost::Config::GS[:external_encoding]

  file_err="#{tmp_filename}.rgerr"

  multipage=@options[:multipage]
  file_out.gsub!(/^(.*)\./,'\1_%04d.') if multipage

  params=RGhost::Config::GS[:default_params].dup #default parameters gs engine
  params << @document.additional_params.join(" ") unless @options[:convert]
  params << "-I#{RGhost::Config::GS[:pslibdir]}"
  params << "-dPDFSETTINGS=/#{@options[:quality]}" if (@options[:device] ==:pdf && @options[:quality])
  params << "-I#{RGhost::Config::GS[:extensions].join(' -I')}" unless RGhost::Config::GS[:extensions].empty?
  params << "-sDEVICE=#{device_for(device)}"
  params.concat format_params(@options[:d],"-d") if  @options[:d]
  params.concat format_params(@options[:s],"-s") if  @options[:s]
  params << "-r#{@options[:resolution]}" if @options[:resolution]
  params << "-g#{@options[:size]}" if @options[:size]
  if @options[:range]
    params << "-dFirstPage=#{@options[:range].first}"
    params << "-dLastPage=#{@options[:range].last}"
  end
  params << "-sstdout=#{shellescape(file_err)}"
  params << "-sOutputFile=#{shellescape(file_out)}"
  params << @options[:raw] if @options[:raw]
  case @document
  when RGhost::Document
    file_in = shellescape("#{tmp_filename}.rgin")
    params.concat @document.gs_paper
    mode=external_encoding.nil? ? 'w' : "w:#{external_encoding}"
    fi=File.open(file_in,mode)
    fi.puts @document.ps
    fi.close
  when File
    file_in=@document.path
    #@delete_input=false unless @options[:debug]
  when String
    file_in = shellescape(@document)
  when Array
    file_in = @document.map{|d| shellescape(d) }.join(' ')
  else
    raise RuntimeError.new("Cannot convert #{@document.class}. Supported classes are RGhost::Document or File or String.")
  end

  params << file_in

  if RGhost::Config::GS[:mode] == :gslib
    require "rghost/rgengine"
    gs=RGEngine.new
    @error=!gs.render(params,params.size)
  else
    require 'rghost/gs_alone'
    gs=RGhost::GSAlone.new(params,@options[:debug])
    @error=!gs.run
  end

  if @error # if error
    @errors=File.open(file_err).readlines if File.exists?(file_err)
    raise RGhost::RenderException.new(@errors.join(" ")) if RGhost::Config::GS[:raise_on_error]
  else
    if multipage
    	file_out.gsub!(/_%04d/,"_*")
      @output=Dir.glob(file_out).map { |f| f }
    else
      @output=File.open(file_out)
    end
  end
  begin
    File.delete(file_err)
    File.delete(file_in) unless (@options[:debug] || @options[:convert])
  rescue
  end
  log(params) if @options[:logfile]
  return @output
end