Class: CombinePDF::PDFWriter

Inherits:
Object
  • Object
show all
Defined in:
lib/combine_pdf/combine_pdf_basic_writer.rb

Instance Method Summary collapse

Constructor Details

#initialize(media_box = [0.0, 0.0, 612.0, 792.0]) ⇒ PDFWriter 



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# File 'lib/combine_pdf/combine_pdf_basic_writer.rb', line 12

def initialize(media_box = [0.0, 0.0, 612.0, 792.0])
  @content_stream = {}
  @media_box = media_box
end

Instance Method Details

#add_content_to_pages(pages = [], location = :above) ⇒ Object

add_content_to_pages(pages = [], location = :above) pages - a page hash or an array of pages location - :above to place content over existing content or :below to place content under existing content



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# File 'lib/combine_pdf/combine_pdf_basic_writer.rb', line 75

def add_content_to_pages(pages = [], location = :above)
  if pages.is_a?(Array)
    pages.each {|p| add_content_to_pages p, location}
  elsif pages.is_a?(Hash)
    #####
    ##add content stream to page
  end
end

#add_text_box(text, args = {}) ⇒ Object

textbox

  • font_name: :font_name

The PostScript names of 14 Type 1 fonts, known as the standard 14 fonts, are as follows: Times-Roman, Helvetica, Courier, Symbol, Times-Bold, Helvetica-Bold, Courier-Bold, ZapfDingbats, Times-Italic, Helvetica- Oblique, Courier-Oblique, Times-BoldItalic, Helvetica-BoldOblique, Courier-BoldOblique

  • text_color: [R, G, B]

an array with three floats, each in a value between 0 to 1. First value is Red, second Green and last is Blue (RGB color system)



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# File 'lib/combine_pdf/combine_pdf_basic_writer.rb', line 25

def add_text_box(text, args = {})
  options = {
    text_alignment: :center,
    text_color: [1,1,1],
    # text_stroke: nil,
    font_name: :Helvetica,
    font_type: :Type1,
    font_object: nil,
    font_size: 12,
    border_color: nil,
    border_width: nil,
    border_radius: nil,
    background_color: nil,
    opacity: 1,
    x: 0,
    y: 0,
    length: -1,
    height: -1,
  }
  # create font object
  font_object = { Type: :Font, Subtype: options[:font_type], BaseFont: options[:font_name]}
  if options[:font_object].is_a?(Hash) && options[:font_object][:indirect_reference_id] && options[:font_object][:indirect_generation_number] && (options[:font_object][:is_reference_only] != true)
    font_object = {is_reference_only: true, referenced_object: font_object}
  end

  # create resources object
  font_name = ("MyFont" + rand(99) ).to_sym
  resources_object = {Resources: {Font: { font_name => font_object }     }    }
  # create box stream

  # reset x,y by text alignment - x,y are calculated from the buttom left
  # each unit (1) is 1/72 Inch
  x = options[:x]
  y = options[:y]
  # create text stream
  text_stream = ""
  text_stream << "BT\n" # the Begine Text marker     
  text_stream << PDFOperations._format_name_to_pdf(font_name) # Set font name
  text_stream << " #{options[:font_size].to_f} Tf\n" # set font size and add font operator
  text_stream << "#{options[:text_color][0]} #{options[:text_color][0]} #{options[:text_color][0]} rg\n" # sets the color state
  text_stream << " #{options[:opacity].to_f} ca\n" # set opacity (alpha) for graphic state.
  text_stream << "#{x} #{y} Td\n" # set location for text object
  text_stream << PDFOperations._format_string_to_pdf(text) # insert the string in PDF format
  text_stream << " Tj\n ET\n" # the Text object operator and the End Text marker
end

#make_into_page ⇒ Object

make_into_page() takes no arguments and returns the contents stream within a page (to be added as an indipendent page to the PDF object)



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# File 'lib/combine_pdf/combine_pdf_basic_writer.rb', line 86

def make_into_page
  {Type: :Page, }
end

#to_pdf(file_name = nil) ⇒ Object

to_pdf() prints out the content stream as raw PDF file_name - the name of the file to which to save the data (will be overwritten). if file_name is given, save to file.



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# File 'lib/combine_pdf/combine_pdf_basic_writer.rb', line 95

def to_pdf( file_name = nil)
  pdf = PDF.new
  pdf << make_into_page
  if file_name
    pdf.save file_name
  else
    pdf.to_pdf
  end
end