Class: Boilerpipe::Filters::BlockProximityFusion

Inherits:
Object
  • Object
show all
Defined in:
lib/boilerpipe/filters/block_proximity_fusion.rb

Constant Summary collapse

MAX_DISTANCE_1 = 
BlockProximityFusion.new(1, false, false)
MAX_DISTANCE_1_SAME_TAGLEVEL = 
BlockProximityFusion.new(1, false, true)
MAX_DISTANCE_1_CONTENT_ONLY = 
BlockProximityFusion.new(1, true, false)
MAX_DISTANCE_1_CONTENT_ONLY_SAME_TAGLEVEL = 
BlockProximityFusion.new(1, true, true)

Instance Method Summary collapse

Constructor Details

#initialize(max_blocks_distance, content_only, same_tag_level_only) ⇒ BlockProximityFusion

Returns a new instance of BlockProximityFusion.



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# File 'lib/boilerpipe/filters/block_proximity_fusion.rb', line 6

def initialize(max_blocks_distance, content_only, same_tag_level_only)
  @max_blocks_distance = max_blocks_distance
  @content_only = content_only
  @same_tag_level_only = same_tag_level_only
end

Instance Method Details

#process(doc) ⇒ Object 



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# File 'lib/boilerpipe/filters/block_proximity_fusion.rb', line 17

def process(doc)
  text_blocks = doc.text_blocks
  return false if text_blocks.size < 2

  prev_block = if @content_only
                 text_blocks.find { |tb| tb.is_content? }
               else
                 text_blocks.first
               end

  return false if prev_block.nil?

  offset = text_blocks.index(prev_block) + 1
  blocks = text_blocks[offset..-1]

  blocks_to_remove = []

  blocks.each do |tb|
    if tb.is_not_content?
      prev_block = tb
      next
    end

    diff_blocks = tb.offset_blocks_start - prev_block.offset_blocks_end - 1
    if diff_blocks <= @max_blocks_distance
      ok = true
      ok = false if (prev_block.is_not_content? || tb.is_not_content?) && @content_only
      ok = false if ok && prev_block.tag_level != tb.tag_level && @same_tag_level_only

      if ok
        prev_block.merge_next(tb)
        blocks_to_remove << tb
      else
        prev_block = tb
      end
    end
  end
  doc.replace_text_blocks!(text_blocks - blocks_to_remove)
  doc
end