Class: CodeSlide::PDFFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/code_slide/pdf_formatter.rb

Instance Method Summary collapse

Constructor Details

#initialize(analyzer) ⇒ PDFFormatter

Returns a new instance of PDFFormatter.



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# File 'lib/code_slide/pdf_formatter.rb', line 5

def initialize(analyzer)
  @analyzer = analyzer
end

Instance Method Details

#_box_position(pdf, width, height, gravity) ⇒ Object 



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# File 'lib/code_slide/pdf_formatter.rb', line 71

def _box_position(pdf, width, height, gravity)
  left    = 0
  hcenter = (pdf.bounds.width - width) / 2
  right   = pdf.bounds.width - width
  top     = pdf.bounds.height
  vcenter = pdf.bounds.height - (pdf.bounds.height - height) / 2
  bottom  = height

  case gravity
  when :northwest then [left,    top    ]
  when :north     then [hcenter, top    ]
  when :northeast then [right,   top    ]
  when :west      then [left,    vcenter]
  when :center    then [hcenter, vcenter]
  when :east      then [right,   vcenter]
  when :southwest then [left,    bottom ]
  when :south     then [hcenter, bottom ]
  when :southeast then [right,   bottom ]
  else raise ArguentError, "unsupported gravity #{gravity.inspect}"
  end
end

#_prepare_background(pdf, bgcolor) ⇒ Object 



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# File 'lib/code_slide/pdf_formatter.rb', line 33

def _prepare_background(pdf, bgcolor)
  bgcolor ||= @analyzer.styles[:background] &&
              @analyzer.styles[:background][:color]
  return unless bgcolor

  pdf.canvas do
    pdf.fill_color bgcolor
    pdf.fill_rectangle [pdf.bounds.left, pdf.bounds.top],
                       pdf.bounds.right, pdf.bounds.top
  end
end

#_prepare_font(pdf) ⇒ Object 



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# File 'lib/code_slide/pdf_formatter.rb', line 45

def _prepare_font(pdf)
  if @font.nil?
    'Courier'
  else
    pdf.font_families.update(
      'Custom' => { normal: @font,
                    bold: @bold,
                    italic: @italic,
                    bold_italic: @bold_italic })
    'Custom'
  end
end

#_prepare_options(pdf, gravity) ⇒ Object 



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# File 'lib/code_slide/pdf_formatter.rb', line 58

def _prepare_options(pdf, gravity)
  width = pdf.width_of('M') * @analyzer.width
  height = pdf.height_of('M') * @analyzer.height

  width += @analyzer.gutter_width

  {
    document: pdf,
    overflow: :overflow,
    at: _box_position(pdf, width, height, gravity)
  }
end

#build_pdf(gravity: :center, background_color: nil, font_size: 16, page_width: 792, page_height: 612) ⇒ Object 



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# File 'lib/code_slide/pdf_formatter.rb', line 18

def build_pdf(gravity: :center,
              background_color: nil,
              font_size: 16, page_width: 792, page_height: 612)
  Prawn::Document.new(page_size: [page_width, page_height]).tap do |pdf|
    Prawn::Font::AFM.hide_m17n_warning = true

    _prepare_background(pdf, background_color)
    pdf.font _prepare_font(pdf), size: font_size
    options = _prepare_options(pdf, gravity)

    box = Prawn::Text::Formatted::Box.new(@analyzer.elements, options)
    box.render
  end
end

#use_font(path, bold: path, italic: path, bold_italic: path) ⇒ Object 



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# File 'lib/code_slide/pdf_formatter.rb', line 9

def use_font(path, bold: path, italic: path, bold_italic: path)
  @font = path
  @bold = bold
  @italic = italic
  @bold_italic = bold_italic

  self
end