Class: PDF::TechBook::TagTocDots

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/techbook.rb

Overview

A stand-alone callback that draws a dotted line over to the right and appends a page number. The info will be like a standard XML tag with three named parameters:

level

The table of contents level that corresponds to a particular style. In the current TechBook implementation, there are only two levels. Level 1 uses a 16 point font and #level1_style; level 2 uses a 12 point font and #level2_style.

page

The page number that is to be printed.

xref

The target destination that will be used as a link.

All parameters are required.

Constant Summary collapse

DEFAULT_L1_STYLE = 
{
  :width      => 1,
  :cap        => :round,
  :dash       => { :pattern => [ 1, 3 ], :phase => 1 },
  :font_size  => 16
}
DEFAULT_L2_STYLE = 
{
  :width      => 1,
  :cap        => :round,
  :dash       => { :pattern => [ 1, 5 ], :phase => 1 },
  :font_size  => 12
}

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.level1_style ⇒ Object

Controls the level 1 style.



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# File 'lib/pdf/techbook.rb', line 308

def level1_style
  @level1_style
end

.level2_style ⇒ Object

Controls the level 2 style.



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# File 'lib/pdf/techbook.rb', line 310

def level2_style
  @level2_style
end

Class Method Details

.[](pdf, info) ⇒ Object 



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# File 'lib/pdf/techbook.rb', line 312

def [](pdf, info)
  if @level1_style.nil?
    @level1_style = sh = DEFAULT_L1_STYLE
    ss      = PDF::Writer::StrokeStyle.new(sh[:width])
    ss.cap  = sh[:cap] if sh[:cap]
    ss.dash = sh[:dash] if sh[:dash]
    @_level1_style = ss
  end
  if @level2_style.nil?
    @level2_style = sh = DEFAULT_L2_STYLE
    ss      = PDF::Writer::StrokeStyle.new(sh[:width])
    ss.cap  = sh[:cap] if sh[:cap]
    ss.dash = sh[:dash] if sh[:dash]
    @_level2_style = ss
  end

  level = info[:params]["level"]
  page  = info[:params]["page"]
  xref  = info[:params]["xref"]

  xpos = 520

  pdf.save_state
  case level
  when "1"
    pdf.stroke_style @_level1_style
    size = @level1_style[:font_size]
  when "2"
    pdf.stroke_style @_level2_style
    size = @level2_style[:font_size]
  end

  page = "<c:ilink dest='#{xref}'>#{page}</c:ilink>" if xref

  pdf.line(xpos, info[:y], info[:x] + 5, info[:y]).stroke
  pdf.restore_state
  pdf.add_text(xpos + 5, info[:y], page, size)
end