Class: TableParser::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/table_parser/parser.rb

Class Method Summary collapse

Class Method Details

.extract_column_headers(rows, dup_rows, dup_cols, has_header) ⇒ Object 



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# File 'lib/table_parser/parser.rb', line 19

def self.extract_column_headers(rows, dup_rows, dup_cols, has_header)
  headers = []

  if has_header
    rows.first.collect do |col|
      header = TableColumn.new(col)
      headers << header
      colspan = col["colspan"].to_i rescue 1
      (colspan-1).times do
        headers << TableColumn.new(col)
      end
    end
    rows.delete_at(0)
  else
    rows.first.collect do |col|
      header = TableColumn.new(nil)
      headers << header
      colspan = col["colspan"].to_i rescue 1
      (colspan-1).times do
        headers << TableColumn.new(nil)
      end
    end
  end
  headers
end

.extract_nodes(input_rows, headers, dup_rows, dup_cols) ⇒ Object 



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# File 'lib/table_parser/parser.rb', line 45

def self.extract_nodes(input_rows, headers, dup_rows, dup_cols)
  data = input_rows.collect do |row|
    row.collect do |ele|
      node = TableNode.new(ele)
    end
  end
  
  columns = []
  curr_x = 0
  curr_y = 0
  data.each do |row|
    columns[curr_y] = [] unless columns[curr_y]

    curr_y = 0
    row.each do |node|
      rowspan = node.rowspan - 1
      colspan = node.colspan - 1

      (0..rowspan).each do |x|
        (0..colspan).each do |y|
          columns[curr_y+y] = [] unless columns[curr_y+y]
          while columns[curr_y+y][curr_x+x]
            curr_y += 1
            columns[curr_y+y] = [] unless columns[curr_y+y]
          end

          if (x == 0 || dup_rows) && (y == 0 || dup_cols)
            columns[curr_y+y][curr_x+x] = node
          else
            columns[curr_y+y][curr_x+x] = EmptyTableNode.new(node.element)
          end
        end
      end
      curr_y += 1
    end
    curr_x += 1
  end
        
  columns.each_index do |col_index|
    columns[col_index].each do |node|
      if headers[col_index]
        headers[col_index].children << node unless node.class == EmptyTableNode
      end
    end
  end
     
  columns
end

.extract_table(doc, xpath) ⇒ Object

extract_table(“www.bs4.jp/table/index.html”, “/html/body/table/tr/td/table”)



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# File 'lib/table_parser/parser.rb', line 8

def self.extract_table(doc, xpath)
  rows = []      
  table = doc.xpath(xpath)
  rows = table.xpath("./thead/tr|./tr|./tbody/tr").collect do |row|
    row.xpath("./td|./th").collect do |col|
      col
    end
  end  
  rows
end