Class: WhirledPeas::Component::ListWithActive

Inherits:
Object
  • Object
show all
Defined in:
lib/whirled_peas/component/list_with_active.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#active_index ⇒ Object

Returns the value of attribute active_index.



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# File 'lib/whirled_peas/component/list_with_active.rb', line 4

def active_index
  @active_index
end

#flow ⇒ Object 



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# File 'lib/whirled_peas/component/list_with_active.rb', line 14

def flow
  @flow || :l2r
end

#items ⇒ Object

Returns the value of attribute items.



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# File 'lib/whirled_peas/component/list_with_active.rb', line 6

def items
  @items
end

#separator ⇒ Object

Returns the value of attribute separator.



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# File 'lib/whirled_peas/component/list_with_active.rb', line 4

def separator
  @separator
end

#viewport_size ⇒ Object 



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# File 'lib/whirled_peas/component/list_with_active.rb', line 28

def viewport_size
  @viewport_size || total_size
end

Instance Method Details

#compose(composer, settings) ⇒ Object 



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# File 'lib/whirled_peas/component/list_with_active.rb', line 32

def compose(composer, settings)
  %i[items].each do |required_attr|
    if send(required_attr).nil?
      raise ArgumentError, "Required field #{required_attr} missing"
    end
  end

  composer.add_box('ListWithActive') do |composer, settings|
    settings.flow = flow
    settings.align = :left
    settings.full_border
    curr_index = active_index || 0
    if flow == :l2r
      settings.width = viewport_size
      active_start = separator.nil? ? 0 : curr_index * separator.length
      items.first(curr_index).each do |item|
        active_start += item.length
      end
      curr_size = items[curr_index].length
    else
      settings.height = viewport_size
      active_start = curr_index + (separator.nil? ? 0 : curr_index)
      curr_size = 1
    end

    if viewport_size < total_size
      front_padding = (viewport_size - curr_size) * 0.667
      offset = (active_start - front_padding).round
      if offset < 0
        offset = 0
      elsif offset > total_size - viewport_size
        offset = total_size - viewport_size
      end

      if flow == :l2r
        settings.content_start.left = -offset
        settings.scrollbar.horiz = true
      else
        settings.content_start.top = -offset
        settings.scrollbar.vert = true
      end
    end

    items.each.with_index do |item, index|
      composer.add_text { separator } if !separator.nil? && index > 0
      composer.add_text do |_, settings|
        if index == active_index
          settings.bg_color = :highlight
          settings.color = :highlight
        end
        item
      end
    end
  end
end

#total_size ⇒ Object 



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# File 'lib/whirled_peas/component/list_with_active.rb', line 18

def total_size
  @total_size ||= if flow == :l2r
    size = separator.nil? ? 0 : (items.count - 1) * separator.length
    items.each { |item| size += item.length }
    size
  else
    items.count + (separator.nil? ? 0 : items.count - 1)
  end
end