aisuii/result.html

## gistfile1.rb
# coding: utf-8

require 'rubygems'
require 'erb'
require 'differ'


MyFormat = Differ::Format::HTML.clone

module MyFormat
  class << self
    private
    def as_change(change)
      as_delete(change) << "\n" << as_insert(change)
    end
  end
end

def diff(prev_text, new_text)
  prev, new = ERB::Util.h(prev_text), ERB::Util.h(new_text)
  differ = Differ.diff_by_line(prev, new)
  differ.format_as MyFormat
end

def diff_html(prev_text, new_text)
  String.new(<<-HTML)
<html>
<head>
<title>diff</title>
<style>
ins.differ {
  background: #cfc;
}
del.differ {
  background: #fcc;
}
</style>
</head>
<body>
<h1>diff</h1>
<pre class="diff">
#{diff(prev_text, new_text)}
</pre>
</body>
</html>
  HTML
end

if __FILE__ == $0

a =<<-EOL
いろはにほへと
ちりぬるをわか
よたれそつねな
らむうゐのおく
やまけふこえて
あさきゆめみし
ゑひもせす
EOL

b =<<-EOL
いろはにほへど
ちりぬるをわが
よたれぞつねな
らむうゐのおく
やまけふこえて
あさきゆめみじ
ゑひもせず
EOL

print diff_html(a, b)
end

## result.html
<html>
<head>
<title>diff</title>
<style>
ins.differ {
  background: #cfc;
}
del.differ {
  background: #fcc;
}
</style>
</head>
<body>
<h1>diff</h1>
<pre class="diff">
<del class="differ">いろはにほへど
ちりぬるをわが
よたれぞつねな</del>
<ins class="differ">いろはにほへと
ちりぬるをわか
よたれそつねな</ins>
らむうゐのおく
やまけふこえて
<del class="differ">あさきゆめみじ
ゑひもせず</del>
<ins class="differ">あさきゆめみし
ゑひもせす</ins>
</pre>
</body>
</html>
	# coding: utf-8

	require 'rubygems'
	require 'erb'
	require 'differ'


	MyFormat = Differ::Format::HTML.clone

	module MyFormat
	class << self
	private
	def as_change(change)
	as_delete(change) << "\n" << as_insert(change)
	end
	end
	end

	def diff(prev_text, new_text)
	prev, new = ERB::Util.h(prev_text), ERB::Util.h(new_text)
	differ = Differ.diff_by_line(prev, new)
	differ.format_as MyFormat
	end

	def diff_html(prev_text, new_text)
	String.new(<<-HTML)
	<html>
	<head>
	<title>diff</title>
	<style>
	ins.differ {
	background: #cfc;
	}
	del.differ {
	background: #fcc;
	}
	</style>
	</head>
	<body>
	<h1>diff</h1>
	<pre class="diff">
	#{diff(prev_text, new_text)}
	</pre>
	</body>
	</html>
	HTML
	end

	if __FILE__ == $0

	a =<<-EOL
	いろはにほへと
	ちりぬるをわか
	よたれそつねな
	らむうゐのおく
	やまけふこえて
	あさきゆめみし
	ゑひもせす
	EOL

	b =<<-EOL
	いろはにほへど
	ちりぬるをわが
	よたれぞつねな
	らむうゐのおく
	やまけふこえて
	あさきゆめみじ
	ゑひもせず
	EOL

	print diff_html(a, b)
	end