Class: Arrolio::Renderer::Pdf

Inherits:
Object
  • Object
show all
Includes:
Assets, FontEmbedding, Metadata
Defined in:
lib/arrolio/renderer/pdf.rb,
lib/arrolio/renderer/pdf/assets.rb,
lib/arrolio/renderer/pdf/metadata.rb,
lib/arrolio/renderer/pdf/font_embedding.rb

Overview

Walks Output::Page and emits PDF bytes via Pdfrb. Supports font embedding: pass font_paths: as a Hash mapping the Style#font_name string to a TTF path, and the renderer will subset + embed each font for the codepoints actually used in the document.

Defined Under Namespace

Modules: Assets, FontEmbedding, Metadata

Constant Summary collapse

MM_TO_PT = 
2.83464567

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Metadata

#apply_metadata, #attach_xmp_metadata, #build_outline

Methods included from Assets

#cover_logo_style, #rasterize_svg, #register_image, #register_logo, #render_cover_logo, #resolve_image_for_pdfrb, #svg_to_png_cache_path

Methods included from FontEmbedding

#attach_to_resources, #collect_codepoints, #prepare_embedded_fonts

Constructor Details

#initialize ⇒ Pdf

Returns a new instance of Pdf.



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# File 'lib/arrolio/renderer/pdf.rb', line 28

def initialize
  @document = Pdfrb::Document.new
  @fonts = FontRegistry.new(@document)
  @images = {}
  @font_paths = {}
  @font_embedders = {}
  @font_encoders = {}
  @font_refs = {}
  @link_annotator = LinkAnnotator.new(@document)
end

Instance Attribute Details

#document ⇒ Object (readonly)

Returns the value of attribute document.



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# File 'lib/arrolio/renderer/pdf.rb', line 26

def document
  @document
end

#fonts ⇒ Object (readonly)

Returns the value of attribute fonts.



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# File 'lib/arrolio/renderer/pdf.rb', line 26

def fonts
  @fonts
end

Instance Method Details



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# File 'lib/arrolio/renderer/pdf.rb', line 53

def header_footer_style
  return @header_footer_style if @header_footer_style

  config = @layout_spec&.header_footer_config || {}
  @header_footer_style = {
    margin_top: (config['margin_top'] || 26.5) * MM_TO_PT,
    margin_bottom: (config['margin_bottom'] || 26.5) * MM_TO_PT,
    margin_lr: (config['margin_lr'] || 25.5) * MM_TO_PT,
    header_offset: (config['header_offset'] || 4) * MM_TO_PT,
    footer_offset: (config['footer_offset'] || 4) * MM_TO_PT,
    font_name: config['font_name'] || 'Helvetica',
    font_size: config['font_size'] || 9.0,
    rule_width: config['rule_width'] || 0.5
  }.freeze
end

#render(pages, io:, logo_path: nil, metadata: {}, font_paths: {}, context: nil, layout_spec: nil) ⇒ Object 



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# File 'lib/arrolio/renderer/pdf.rb', line 39

def render(pages, io:, logo_path: nil, metadata: {},
           font_paths: {}, context: nil, layout_spec: nil)
  @font_paths = font_paths.transform_keys(&:to_s)
  @layout_spec = layout_spec
  apply_metadata(metadata)
  attach_xmp_metadata(metadata)
  @logo_ref = (logo_path)
  prepare_embedded_fonts(pages)
  pages.each { |page| render_page(page) }
  build_outline(context, pages) if context
  @document.write(io.is_a?(String) ? io : nil,
                  io: io.is_a?(String) ? nil : io)
end