Module: HTMLDiff

Includes:

Diff

Defined in:

lib/diff.rb

Defined Under Namespace

Classes: Builder

Class Method Summary

• .diff(a, b) ⇒ Object
• .html2list(x) ⇒ Object
• .is_newline(x) ⇒ Object
• .is_p_close_tag(x) ⇒ Object
• .is_p_open_tag(x) ⇒ Object

Methods included from Diff

calculate_ratio, count_leading, get_close_matches

Class Method Details

.diff(a, b) ⇒ Object

# File 'lib/diff.rb', line 399

def self.diff(a, b)
  a = html2list(a)
  b = html2list(b)

  out = Builder.new(a, b)
  s = SequenceMatcher.new(a, b)

  s.get_opcodes.each do |opcode|
    out.do_op(opcode)
  end

  out.result 
end

.html2list(x) ⇒ Object

# File 'lib/diff.rb', line 413

def self.html2list(x)
  mode = :char
  cur = ''
  out = []
  
  x.split('').each do |c|
    if mode == :tag
      cur += c
      if c == '>'
        out.push(cur)
        cur = ''
        mode = :char
      end
    elsif mode == :char
      if c == '<'
        out.push cur
        cur = c
        mode = :tag
      elsif c =~ /\s/
        out.push cur + c
        cur = ''
      else
        cur += c
      end
    end
  end

  out.push cur
  out.find_all { |x| x != '' }
end

.is_newline(x) ⇒ Object

# File 'lib/diff.rb', line 387

def self.is_newline(x)
  (x == "\n") or (x == "\r") or (x == "\t")
end

.is_p_close_tag(x) ⇒ Object

# File 'lib/diff.rb', line 395

def self.is_p_close_tag(x)
  x =~ %r!\A</(p|li|ul|ol|dir|dt|dl)!
end

.is_p_open_tag(x) ⇒ Object

# File 'lib/diff.rb', line 391

def self.is_p_open_tag(x)
  x =~ /\A<(p|li|ul|ol|dir|dt|dl)/
end