Add bin and edit workflow

bin/gems/pdf-reader-2.14.1/examples/extract_bates.rb

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+#!/usr/bin/env ruby
+# coding: utf-8
+
+# A sample script that attempts to extract bates numbers from a PDF file.
+# Bates numbers are often used to markup documents being used in legal
+# cases. For more info, see http://en.wikipedia.org/wiki/Bates_numbering
+#
+# Acrobat 9 introduced a markup syntax that directly specifies the bates
+# number for each page. For earlier versions, the easiest way to find
+# the number is to look for words that match a pattern.
+#
+# This example attempts to extract numbers using the Acrobat 9 syntax.
+# As a fall back, you can use a regular expression to look for words
+# that match the numbers you expect in the page content.
+
+require 'rubygems'
+require 'pdf/reader'
+
+class BatesReceiver
+
+  attr_reader :numbers
+
+  def initialize
+    @numbers = []
+  end
+
+  def begin_marked_content(*args)
+    return unless args.size >= 2
+    return unless args.first == :Artifact
+    return unless args[1][:Subtype] == :BatesN
+
+    @numbers << args[1][:Contents]
+  end
+  alias :begin_marked_content_with_pl :begin_marked_content
+
+end
+
+filename = File.expand_path(File.dirname(__FILE__)) + "/../spec/data/cairo-basic.pdf"
+
+PDF::Reader.open(filename) do |reader|
+  reader.pages.each do |page|
+    receiver = BatesReceiver.new
+    page.walk(receiver)
+    if receiver.numbers.empty?
+      puts page.text.scan(/CC.+/)
+    else
+      puts receiver.numbers.inspect
+    end
+  end
+end