Module: DSR

Defined in:
lib/dsr.rb

Class Method Summary collapse

Class Method Details

.google2struct(json) ⇒ Object 



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# File 'lib/dsr.rb', line 16

def self.google2struct json
  require "json"
  Texts.new( JSON.load(json).tap do |json|
    require "nakischema"
    Nakischema.validate json, {
      hash_req: {
      "cropHintsAnnotation" => Hash,
      "fullTextAnnotation" => Hash,
      "imagePropertiesAnnotation" => Hash,
      "labelAnnotations" => Array,
      "safeSearchAnnotation" => Hash,
      "textAnnotations" => { each: {
        hash_req: {
          "boundingPoly" => { hash: {
            "vertices" => { size: 4..4, each: { hash: { "x" => Integer, "y" => Integer } } },
          } },
          "description" => /\A\S(.*\S)?\z/m,
        },
        hash_opt: {
          "locale" => /\A\S(.*\S)?\z/m,
        },
      } },
      },
      hash_opt: {
        "localizedObjectAnnotations" => Array,
      }
    }
  end["textAnnotations"].map do |text|
    Struct.new text["description"],
               text["boundingPoly"]["vertices"].map{ |_| _["x"] }.min,
               text["boundingPoly"]["vertices"].map{ |_| _["y"] }.max,
               text["boundingPoly"]["vertices"].map{ |_| _["x"] }.max,
               text["boundingPoly"]["vertices"].map{ |_| _["y"] }.min,
               text["boundingPoly"]["vertices"].map{ |_| _["x"] }.max - text["boundingPoly"]["vertices"].map{ |_| _["x"] }.min,
               text["boundingPoly"]["vertices"].map{ |_| _["y"] }.max - text["boundingPoly"]["vertices"].map{ |_| _["y"] }.min
  end )
end

.link(headers, array, direction, alignment, *priority) ⇒ Object 



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# File 'lib/dsr.rb', line 54

def self.link headers, array, direction, alignment, *priority
  l, r = case direction
  when :horizontal ; %i{ left right }
  when :vertical ; %i{ top bottom }
  else ; fail "invalid direction"
  end
  headers = headers.sort_by(&l).map(&:dup)
  headers.each_cons(2){ |a, b| a[r], b[l] = [a[r], b[l]].max, [a[r], b[l]].min }
  headers.first[l] = -Float::INFINITY
  headers.last[r] = +Float::INFINITY
  headers.unshift headers.delete_at headers.index{ |_| priority.include? _.text } unless priority.empty?   # TODO: document/explain this
  array.sort_by(&l).each_with_object([]) do |cell, a|
    i = headers.public_send(alignment){ |_| (_[l].._[r]).include?((cell[l]+cell[r])/2) }
    a[i] ||= []
    a[i] << cell
  end
end

.pdf2struct(object) ⇒ Object 



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# File 'lib/dsr.rb', line 71

def self.pdf2struct object
  require "hexapdf"
  processor = Class.new HexaPDF::Content::Processor do
    attr_reader :texts
    def initialize _
      super
      @texts = Texts.new
    end
    def show_text str
      boxes = decode_text_with_positioning str
      @texts.push Struct.new boxes.string,
        boxes.lower_left[0], -boxes.lower_left[1],
        boxes.upper_right[0], -boxes.upper_right[1],
        boxes.upper_right[0] - boxes.lower_left[0],
        boxes.lower_left[1] - boxes.upper_right[1]
    end
  end
  HexaPDF::Document.new(io: object).pages.map do |page|
    processor.new(page).tap(&page.method(:process_contents)).texts
  end
end

.subgraphs(data) ⇒ Object 



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# File 'lib/dsr.rb', line 93

def self.subgraphs data
  data.zip.tap do |array|
    (0...data.size).each do |i|
      (0...i).to_a.select do |j|
        array[i].product(array[j]).any?{ |i,j| yield i,j }
      end.each do |j|
        array[i].concat array[j]
        array[j].clear
      end
    end
  end.reject &:empty?
end