Class: PDF::Reader::Turtletext::Textangle

Inherits:
Object
  • Object
show all
Defined in:
lib/pdf/reader/turtletext/textangle.rb

Overview

A DSL syntax for text extraction.

textangle = PDF::Reader::Turtletext::Textangle.new(reader) do |r|

r.page = 1
r.below = "Electricity Services"
r.above = "Gas Services by City Gas Pte Ltd"
r.right_of = 240.0
r.left_of = "Total ($)"

end textangle.text

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(turtletext_reader, &block) ⇒ Textangle

turtletext_reader is a PDF::Reader::Turtletext



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 18

def initialize(turtletext_reader,&block)
  @reader = turtletext_reader
  @page = 1
  if block_given?
    if block.arity == 1
      yield self
    else
      instance_eval &block
    end
  end
end

Instance Attribute Details

#above(*args) ⇒ Object 



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 30

def above(*args)
  if value = args.first
    @above = value
  end
  @above
end

#below(*args) ⇒ Object 



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 37

def below(*args)
  if value = args.first
    @below = value
  end
  @below
end

#left_of(*args) ⇒ Object 



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 44

def left_of(*args)
  if value = args.first
    @left_of = value
  end
  @left_of
end

#page ⇒ Object

Returns the value of attribute page.



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 14

def page
  @page
end

#reader ⇒ Object (readonly)

Returns the value of attribute reader.



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 13

def reader
  @reader
end

#right_of(*args) ⇒ Object 



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 51

def right_of(*args)
  if value = args.first
    @right_of = value
  end
  @right_of
end

Instance Method Details

#text ⇒ Object

Returns the text



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# File 'lib/pdf/reader/turtletext/textangle.rb', line 59

def text
  return unless reader

  xmin = if right_of
    if [Fixnum,Float].include?(right_of.class)
      right_of
    else
      reader.text_position(right_of,page)[:x] + 1
    end
  else
    0
  end
  xmax = if left_of
    if [Fixnum,Float].include?(left_of.class)
      left_of
    else
      reader.text_position(left_of,page)[:x] - 1
    end
  else
    99999 # TODO actual limit
  end

  ymin = if above
    if [Fixnum,Float].include?(above.class)
      above
    else
      reader.text_position(above,page)[:y] + 1
    end
  else
    0
  end
  ymax = if below
    if [Fixnum,Float].include?(below.class)
      below
    else
      reader.text_position(below,page)[:y] - 1
    end
  else
    99999 # TODO actual limit
  end

  reader.text_in_region(xmin,xmax,ymin,ymax,page)
end