Class: Textbringer::Presentation::SlideList

Inherits:
Object
  • Object
show all
Defined in:
lib/textbringer/presentation/slide_list.rb

Instance Method Summary collapse

Constructor Details

#initialize(buffer) ⇒ SlideList

Returns a new instance of SlideList.



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# File 'lib/textbringer/presentation/slide_list.rb', line 25

def initialize(buffer)
  @buffer = buffer
  doc = Commonmarker.parse(@buffer.to_s)
  @list = []
  slide = nil
  i = 1
  @buffer.save_excursion do
    doc.each do |node|
      if node.type == :heading
        @buffer.goto_line(node.source_position[:start_line])
        slide.end_pos = @buffer.point - 1 if slide
        title = node.map { |c| c.string_content }.join.strip
        slide = Slide.new(@buffer, i, title)
        slide.start_pos = @buffer.point
        @list.push(slide)
        i += 1
      end
    end
    slide.end_pos = @buffer.point_max if slide
  end
  @index = @list.index { |slide|
    slide.start_pos <= @buffer.point && @buffer.point <= slide.end_pos
  } || 0
end

Instance Method Details

#backward_slide ⇒ Object 



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# File 'lib/textbringer/presentation/slide_list.rb', line 75

def backward_slide
  if @index > 0
    @index -= 1
  end
end

#current ⇒ Object 



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# File 'lib/textbringer/presentation/slide_list.rb', line 54

def current
  @list[@index]
end

#current_page ⇒ Object 



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# File 'lib/textbringer/presentation/slide_list.rb', line 58

def current_page
  @index + 1
end

#forward_slide ⇒ Object 



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# File 'lib/textbringer/presentation/slide_list.rb', line 69

def forward_slide
  if @index < @list.size - 1
    @index += 1
  end
end

#goto_page(no) ⇒ Object 



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# File 'lib/textbringer/presentation/slide_list.rb', line 62

def goto_page(no)
  if no < 1 || no > @list.size
    raise ArgumentError, "Invalid page number: #{no}"
  end
  @index = no - 1
end

#size ⇒ Object 



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# File 'lib/textbringer/presentation/slide_list.rb', line 50

def size
  @list.size
end