Class: Przn::PdfExporter

Inherits:
Object
  • Object
show all
Defined in:
lib/przn/pdf_exporter.rb

Constant Summary collapse

PAGE_WIDTH = 
960
PAGE_HEIGHT = 
540
DEFAULT_FONT_SIZE = 
18
DEFAULT_SCALE_TO_PT = 
{
  1 => 10, 2 => 18, 3 => 24, 4 => 32,
  5 => 40, 6 => 48, 7 => 56,
}.freeze
DEFAULT_SCALE = 
Renderer::DEFAULT_SCALE
COLOR_MAP = 
{
  'red' => 'FF5555', 'green' => '50FA7B', 'yellow' => 'F1FA8C', 'blue' => '6272A4',
  'magenta' => 'FF79C6', 'cyan' => '8BE9FD', 'white' => 'F8F8F2',
  'bright_red' => 'FF6E6E', 'bright_green' => '69FF94', 'bright_yellow' => 'FFFFA5',
  'bright_blue' => 'D6ACFF', 'bright_magenta' => 'FF92DF', 'bright_cyan' => 'A4FFFF',
  'bright_white' => 'FFFFFF',
}.freeze
FONT_SEARCH_PATHS =

Fallback font paths when fc-match is not available. Prawn’s ttfunk requires TrueType outlines (glyf table), not CFF-based fonts.

[
  -> { File.join(Dir.home, 'Library/Fonts/NotoSansJP-Regular.ttf') },
  -> { Dir.glob('/usr/share/fonts/**/NotoSansCJK-Regular.ttc').first },
  -> { Dir.glob('/usr/share/fonts/**/NotoSansJP-Regular.ttf').first },
  -> { File.join(Dir.home, 'Library/Fonts/HackGen-Regular.ttf') },
  -> { '/Library/Fonts/Arial Unicode.ttf' },
  -> { '/System/Library/Fonts/Supplemental/Arial Unicode.ttf' },
].freeze
FALLBACK_FONT_FAMILIES = 
%w[NotoSansCJK NotoSansJP HackGen].freeze

Instance Method Summary collapse

Constructor Details

#initialize(presentation, base_dir: '.', theme: nil) ⇒ PdfExporter

Returns a new instance of PdfExporter.



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# File 'lib/przn/pdf_exporter.rb', line 54

def initialize(presentation, base_dir: '.', theme: nil)
  @presentation = presentation
  @base_dir = base_dir
  @theme = theme || Theme.default
  @bg_color = @theme.colors[:background]
  @fg_color = @theme.colors[:foreground]
  @code_bg = @theme.colors[:code_bg]
  @dim_color = @theme.colors[:dim]
  @inline_code_color = @theme.colors[:inline_code]
  @heading_color = @theme.colors[:heading] || @fg_color
  base = (@theme.font[:size] || DEFAULT_FONT_SIZE).to_f
  ratio = base / DEFAULT_FONT_SIZE
  @scale_to_pt = DEFAULT_SCALE_TO_PT.transform_values { |v| v * ratio }
end

Instance Method Details

#export(output_path) ⇒ Object 



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# File 'lib/przn/pdf_exporter.rb', line 82

def export(output_path)
  require 'prawn'
  Prawn::Text::Formatted::LineWrap.prepend(PrawnCJKLineWrap) unless Prawn::Text::Formatted::LineWrap < PrawnCJKLineWrap

  pdf = Prawn::Document.new(
    page_size: [PAGE_WIDTH, PAGE_HEIGHT],
    margin: 0,
  )

  register_fonts(pdf)

  @presentation.slides.each_with_index do |slide, si|
    pdf.start_new_page unless si == 0
    render_slide(pdf, slide, si)
  end

  pdf.render_file(output_path)
end