require 'prawn/measurement_extensions' #----- A4 page size page_size = 'A4' page_height = 842 page_width = 595 #----- margins body_width = 400 top_margin = 50 bottom_margin = 20 footer_height = top_margin - bottom_margin right_margin = (page_width - body_width)/2 left_margin = right_margin #----- size of images max_logo_width = body_width max_logo_height = 50.mm max_signature_size = 50.mm prawn_document(margin: [top_margin, right_margin, bottom_margin, left_margin], page_size: page_size) do |pdf| pdf.font_families.update( 'liberation serif' => { normal: Rails.root.join('lib/prawn/fonts/liberation_serif/LiberationSerif-Regular.ttf' )}) pdf.font 'liberation serif' grey = '555555' black = '333333' body_height = pdf.cursor - footer_height pdf.bounding_box([0, pdf.cursor], width: body_width, height: body_height) do if @logo.present? logo_file = if @logo.is_a?(ActiveStorage::Attached::One) @logo.download else @logo.read end pdf.image StringIO.new(logo_file), fit: [max_logo_width , max_logo_height], position: :center end pdf.fill_color grey pdf.pad_top(40) { pdf.text "le #{l(@created_at, format: '%e %B %Y')}", size: 10, align: :right, character_spacing: -0.5 } pdf.fill_color black pdf.pad_top(40) { pdf.text @title, size: 18, character_spacing: -0.2 } pdf.fill_color grey pdf.pad_top(30) { pdf.text @body, size: 10, character_spacing: -0.2, align: :justify } if @signature.present? pdf.pad_top(40) do signature_file = if @signature.is_a?(ActiveStorage::Attached::One) @signature.download else @signature.read end pdf.image StringIO.new(signature_file), fit: [max_signature_size , max_signature_size], position: :right end end end pdf.repeat(:all) do pdf.move_cursor_to footer_height - 10 pdf.fill_color grey pdf.text @footer, align: :center, size: 8 end end